Body shape not arched; coloration non-metallic. Head width slightly less than thorax width; nearly spherical in shape; ocellar tubercle raised and rounded with three ocelli; postocular ridge and occiput rounded; posterior margin of eye rounded; eye sparsely pilose with minute setae (not more than 4× length of single ommatidium); eyes either contiguous above antennal base or with antennal base adjacent to dorsal eye margin, contiguous below antennal base; palpus absent; proboscis length greatly reduced with sparse pile; antennae located near or adjacent to ocellar tubercle; flagellum stylate, apex with terminal seta(e); scapes not fused together; postpronotal lobes not enlarged or contiguous medially; antepronotum narrow; subscutellum enlarged; legs not elongated; tibial spines absent; pulvilli present; wing markings and microtrichia absent. Costal vein ending near wing apex; costal margin straight; humeral crossvein absent; R₁ inflated at pterostigma; radial veins straight, veins R₄ and R₅ present as single fused vein; crossvein 2r-m present between M₁ and R₄₊₅, bisecting cell r₄₊₅, basal portion of cell narrow elongate; two M veins present, not reaching wing margin; discal cell closed; cell m₃ absent; CuA₁ joining M₃; anal lobe well developed; alula well developed. Abdomen greatly rounded, inflated, tergites smooth.

Sphaerops is an endemic Chilean genus than can be readily differentiated from all other acrocerine genera based on the sparsely pilose eyes, wing vein A₁ fused to CuA₂ and the bulbous genitalia. Sphaerops is also unique in exhibiting the widest range in size variation within acrocerids. The genus shows remarkable similarity to the Chilean endemic genus Villalus, sharing numerous characteristics such as having the antennae placed away from the ocellar tubercle (except in Sphaerops micella) and vein R₄₊₅ present as a single, unforked, vein. Evert I. Schlinger has reared numerous Sphaerops individuals and reported that the mature larvae fed externally on spiders for up to three weeks. This type of development is unique as all other acrocerids with known larval habits are endoparasitoids until emerging to pupate (Schlinger 1987).

Holotype male: Top label: “CHILE, Region III, Copiapó Prov / 125 km SE Copiapó; Fundo La / Semilla; malaise on alluvium nr river; / 30.x-9.xi.2003; ME Irwin; FD Parker / 2358 m; 28°15.04'S, 69°44.46'W”. Bottom label: red “HOLOTYPE ♂/ Sphaerops micella/ Schlinger new species/ Det. E.I. Schlinger 2012” (CAS).

All from Chile and bearing yellow paratype labels. Some with genitalia dissected and placed in glycerin in microvial on pin with specimen. Same data as holotype (4 ♂, CAS); Same except: 2 km E Puente La Semilla: 119 km SE Copiapó; malaise nr wash with water; 11–17.x.2003; ME Irwin; 2082 m; 28°12.90'S, 69°45.66'W (1 ♂, CAS); Quillota Province; Palma de Ocoa; Parque Nacional Campanas; malaise in hillside draw; 215 m; 29.xii.1999; ME Irwin, EI Schlinger; 32.9324°S, 71.0781°W (EI Schlinger #010913; 1 ♂, CAS); same except: 2–10.i.2000 (EI Schlinger #013443-013449; 7 ♂, CAS); Region VI, Limarí Prov. Frey Jorge Nat’l Park, Quebrada Honda I; malaise in small wash; 15–31.x.2003; ME Irwin, FD Parker; 122 m; 30°41.4'S, 71°37.8'W (8 ♂); same except: 1–7.xi.2003 (ME Irwin #174749-174752, #174754-174756; 6 ♂, 1?, CAS); same except: El Mineral, malaise in wash upstream of seep, 23.xi–12.xii.2003; ME Irwin, FD Parker; 224 m; 30°39.44'S, 71°39.90'W (2 ♂, CAS).

This species is much smaller than Sphaerops appendiculata (1.9 mm versus 6.3 mm) and has shorter pile on the thorax and abdomen. It is also unique in having the antennae placed immediately adjacent to the ocellar tubercle, the wing veins pale yellow, and wing veins CuA₂ and A₁ remaining separate.

Male with small body length: 1.9 ± 0.6 mm (1.4-2.4 mm, n = 10) and wing just longer than body: 2.2 ± 0.5 mm (1.7 -2.5 mm, n = 10) setae covering body and legs is fine and short (Fig. 1). Female unknown. Head. Eye dark brown, occiput black, covered with pale yellow pile; ocellar tubercle black; ocelli white, frons dark brown, antennae light brown and placed on mediodorsal eye margin, face dark brown with pale yellow pile, clypeus light brown, bare and shorter than the antennae, mouthparts yellow and strongly reduced. Thorax. Uniformly dark brown with covering pale yellow setae; coxae light brown, femora light brown with apex yellow, tibia light brown with basal third yellow , tarsi light brown, basal and apical tarsomeres longer than middle tarsomeres, lower calypter translucent white and covered with pale yellow setae, halter pale yellow. Wing. (Fig. 2) All wing veins pale yellow except costa, subcosta and R₁ pale brown; pterostigma darker. Abdomen. Background color brown tergites I-II entirely brown, tergite III with posteriomedial portion yellow, tergites IV-VI medially yellow, sternites brown.

Based on an examination of the voucher specimens of Sphaerops sequenced by Winterton et al. (2007) these were representatives of Sphaerops micella sp. n. not Sphaerops appendiculata as reported. Therefore the taxon associated with Genbank accession numbers AY140877, AF539875, AY144436, and AY144403 will be changed to Sphaerops micella sp. n.

Etymology. The species epithet is derived from the Latin: micella (diminutive feminine) meaning; little, crumb, or small, in reference to the minute size of this species relative to Sphaerops appendiculata.

Figure 1.

Sphaerops micella Schlinger sp. n., male paratype, lateral view. Scale bar = 1.0 mm.

Figure 2.

Sphaerops micella Schlinger sp. n., wing. Scale bar = 1.0 mm.

CHILE; Santiago Prov.; 3 km N. El Arrayan; 7.ix.1966; 1150 m; 33°21'S, 70°28'W; EI Schlinger, ME Irwin. [reared from Sequestriidae (Araneae), remains of spider host pinned with specimen], (EIS # 2951, 2952 (host); 1 ♂, CAS); [Chile] Santiago, 15.xi.[19]39, Stuardo (EIS # 2974; 1 ♂, CAS); [Chile] El Canalo, 15.x.1933; Stuardo (EIS # 2978; 1 ♂, CAS).

Pile covering body and legs is much longer and denser than in Sphaerops micella sp. n. (Fig. 3). Antennae are inserted on the head near but not immediately adjacent to the ocellar tubercle. This species is also much larger (6.3 vs 1.9 mm), has brown rather than yellow wing veins, and the wing veins CuA₂ and A₁ join near the wing margin.

Male with medium body size: (Fig. 3) 6.3 ± 1.2 mm (5.8 - 7.0 mm, n = 3) and wing shorter than the body: 5.9 ± 1.4 mm (5.1 - 6.4 mm, n = 3). Head. (Fig. 4) Eye dark brown, occiput and ocellar tubercle dark brown, covered with pale yellow pile; ocelli light brown, frons dark brown and strongly reduced, antennae light brown, face dark brown with pale yellow pile, clypeus dark brown, bare and as long as scape and pedicel combined, mouthparts yellow and strongly reduced. Thorax. Uniformly dark brown with dense covering pale yellow pile; coxae dark brown, femora, tibia and tarsi light brown, basal tarsomere longer than remaining tarsomeres, lower calypter pale yellow with light brown margin and covered with dense pale yellow pile, halter yellow. Wing. (Fig. 5) All wing veins brown. Abdomen. Tergites dark brown, sternites dark brown with posterior margin yellow.

Figure 3.

Sphaerops appendiculata Philippi, 1865, male, lateral view. Scale bar = 1.0 mm.

Figure 4.

Sphaerops appendiculata Philippi, 1865, male, anterior view. Scale bar = 1.0 mm.

Figure 5.

Sphaerops appendiculata Philippi, 1865, wing. Scale bar = 1.0 mm.

Neophilopota brevirostris sp. n., by present designation.

Neophilopota gen. n.is an endemic Mexican genus similar to Quasi, Oligoneura and Philopota. It can be easily distinguished from the Central American genus Quasi as Neophilopota has pilose eyes and well developed mouthparts (forming an elongate proboscis). It shows greater similarity to both the Palearctic Oligoneura and the Neotropical Philopota in having elongate mouthparts and the ocellar tubercle poorly developed. It is easily distinguished from Philopota by having the frons as long as wide (though shorter than the antennae), the insertion of the antennae on the lower part of the frons, the lower facial margin wider in the upper portion than in lateral portions, and the clypeus shorter than the antennae. It can be readily differentiated from Oligoneura by the absence of the palpi, the presence of pile on the frons, the insertion of antennae on the lower portion of the head, the clypeus being shorter than the antennae and the legs greatly elongated. Neophilopota was referred to as ‘New Genus A’ in the Manual of Central American Diptera (Schlinger 2009).

Body shape arched (Fig. 6); coloration non-metallic. Head width slightly smaller than thorax width (Fig. 7); nearly spherical; ocellar tubercle slightly raised, rounded with three ocelli (Fig. 8); postocular ridge and occiput extended posteriorly into acute ridge; posterior margin of eye rounded; eye sparsely pilose; eyes contiguous above antennal base; not contiguous below; palpus absent; proboscis length subequal to or slightly greater than head length; without pile, or setae barely evident; antennae located nearer to mouthparts (Figs 8, 9); flagellum stylate; apex lacking terminal setae; scapes not fused together; postpronotal lobes enlarged, medially contiguous forming a collar; antepronotum narrow; subscutellum enlarged; legs greatly elongated; tibial spines absent; pulvilli present; wing markings and microtrichia absent (Fig. 10); costa ending near wing apex; costal margin straight; humeral crossvein present; radial veins straight, R₁ not inflated distally; veins R₄ and R₅ present as single vein; crossvein 2r-m absent; two M veins present, not reaching wing margin; discal cell open distally; cell m₃ absent; CuA₁ reduced, not reaching wing margin; CuA₂ reduced; anal lobe well developed; alula well developed; abdomen conical, tapering towards apex; tergites smooth, rounded.

Neophilopota brevirostris sp. n.

The prefix of the genus epithet (neo) is derived from the Latin for “new”, referring to this being a new genus. The suffix, -philopota, is used in reference to Neophilopota’s similarity to Philopota.

Figure 6.

Neophilopota brevirostris Schlinger sp. n., male holotype, lateral view. Scale bar = 2.0 mm.

Figure 7.

Neophilopota brevirostris Schlinger sp. n., male holotype, dorsal view. Scale bar = 2.0 mm.

Figure 8.

Neophilopota brevirostris Schlinger sp. n., head, lateral view. Scale bar = 1.0 mm.

Figure 9.

Neophilopota brevirostris Schlinger sp. n., head, frontal view. Scale bar = 1.0 mm.

Figure 10.

Neophilopota brevirostris Schlinger sp. n., wing, dorsal view. Scale bar = 1.0 mm.

Holotype male: Top label “Fortin de las / Flores, Ver., / Mex.”. “Doyen and / Foster Collec.”. “USNM”. Middle label bright green “Acroceridae / E.I. Schlinger / Specimen / 004294”. Bottom label: red “HOLOTYPE ♂ / Neophilopota/ brevirostris/ Schlinger” (USNM).

Paratype male: “Rio Metlac, MEX. / Fortin de las Flores / Veracruz / VIII-17-1965 / L.R. Gillogly”. “E.I. Schlinger / Collection”. red label “Genitalia / Dissection No. 78-6-22k. / by E.I. Schlinger”. bright green label “Acroceridae / E.I. Schlinger / Specimen / 004293” . Bottom label: yellow “Paratype ♂ / Neophilopota / brevirostris / Schlinger” (CAS). Genitalia dissected and placed in glycerin in glass microvial on pin with specimen.

Male with medium body size (male body: 9.5–12.3 (holotype) mm; n = 2) and wing longer than the body (male wing: 10.8–15.1 (holotype) mm; n = 2). Head. (Figs 8, 9) Ocellar tubercle brown; antennae brown (Fig. 6), longer than frons; postocular ridge brown, wider than clypeus; face black; clypeus brown, shorter than antennae and bare. Thorax. (Fig. 7) Brown with dark brown markings; legs elongate; coxae brown; femora brown with apex light brown; tibia brown; tarsi brown; lower calypter brown with dark brown margin. Wing. (Fig. 10) Infuscate, without markings; wing veins brown. Abdomen. Tergite I entirely brown; tergites II-VI brown with lateral margin yellow; sternites yellow.

The proboscis in the holotype is broken (Fig. 6), but in the paratype it is longer than the head height and shorter than the body length.

The species epithet is derived from the Latin: brevis (short) and rostris (beak), in reference to the short length of proboscis in comparison to species of Philopota.

Coquena stangei Schlinger sp. n.

Coquena is a South American genus readily distinguished from other panopine genera by the minute mouthparts, the ocellar tubercle extremely raised and the iridescent body color. It is closely related to the Neotropical genera Lasioides and Pteropexus, the Nearctic genus Eulonchus, and the New World genus Lasia, as it shares the same wing venation. However it does not have the elongate proboscis present in these genera. Coquena and Lasioides are closely related, monotypic, genera. The mouthparts in Coquena stangei are strongly reduced, whereas they are elongate in Lasioides peruanus Gil Collado, 1928. Coquena shares some attributes with Lasia such as the presence of an alula and having the eyes separate below the antennae. It also shares several characteristics with Eulonchus, principally the extremely raised ocellar tubercle and presence of maxillary palpi.

Body shape not arched (Figs 11, 13); coloration metallic iridescent. Head width slightly narrower than thorax width (Figs 12, 14); hemispherical; ocellar tubercle shape greatly raised and irregularly shaped, 1/4 to 1/2 as high as head; two ocelli, anterior ocellus absent; postocular ridge and occiput rounded; posterior margin of eye rounded; eye densely pilose; eyes not contiguous above antennal base; palpus present; proboscis greatly reduced, without pile, or setae barely evident; antennae located on middle of frons; flagellum elongate, paddle-shaped, much larger in male, apex lacking terminal setae; scapes not fused together; postpronotal lobes not enlarged or contiguous medially; antepronotum narrow; subscutellum barely visible beneath scutellum; legs not elongate; tibial spines present apically; pulvilli present; wing markings and microtrichia absent (Fig. 15); costa circumscribing entire wing margin, costal margin straight; humeral crossvein present; radial veins straight; R₁ not inflated distally; veins R₄ and R₅ present; crossvein 2r-m present between M₁ and R₄₊₅, bisecting cell r₄₊₅; cell formed by 2r-m present, narrow and elongate; M₁, M₂ and M₃ present (M₃ fused with CuA₁), reaching wing margin; discal cell closed completely; cell m₃ present; CuA₁ joining M₃, and running to margin; CuA₂ fused to A₁ before wing margin and then running to margin; anal lobe well developed; alula well developed; abdomen greatly rounded, inflated, tergites smooth.

The genus epithet is derived from the Coquena legend of north-western Argentina. Coquena was the son of Mother Earth and was portrayed as a short man dressed in a hat and bright colored poncho. The iridescent coloration, hat-like ocellar tubercle and type locality in northwest Argentina of the type species led to the choice of this name for the genus.

Figure 11.

Coquena stangei Schlinger sp. n., male holotype, lateral view. Scale bar = 1.0 mm.

Figure 12.

Coquena stangei Schlinger sp. n., male holotype, anterior view. Scale bar = 1.0 mm.

Figure 13.

Coquena stangei Schlinger sp. n., female paratype, lateral view. Scale bar = 1.0 mm.

Figure 14.

Coquena stangei Schlinger sp. n., female paratype, anterior view. Scale bar = 1.0 mm.

Figure 15.

Coquena stangei Schlinger sp. n., wing. Scale bar = 1.0 mm.

Holotype male: Top label: “El Solidad, Argentina/ 11 km. W Las Cejas/ Tucuman Prov./ IV-30 to V-13-1967/ L. Stange (malaise)” [26.895318°S, 64.835332°W]. Second label: “Genitalia IX-10-69/ Dissection No. 9/ by E.I. Schlinger”. Third label: bright green “ACROCERIDAE/ E.I. Schlinger/ Specimen #/ 013435”. Bottom label: red “HOLOTYPE ♂/ Coquena stangei/ Schlinger new species/ Det. E.I. Schlinger 2012” (CAS). Genitalia dissected and placed in glycerin in glass microvial on pin with specimen.

Four females, same data as holotype except: genitalia not dissected; EIS specimen numbers are: 013436, 013437, 013438, 013441; and with yellow paratype labels.

Male holotype with medium body size (Fig. 11): 7.80 mm and wing shorter than body: 7.0 mm. Female with medium body size (Fig. 13): 6.7 ± 1.21 mm (6.0 - 7.5 mm, n= 4) and wing longer than the body: 7.8 ± 1.2 mm (7.0 - 8.5 mm, n= 4). Head. Eyes dark brown and densely covered with pale yellow pile (Figs 12, 14), occiput and ocellar tubercle dark brown and covered with yellow pile, ocelli light brown, frons dark brown with region adjacent to antennae yellow, scape and pedicel light brown with apex yellow, pedicel with light brown pile, flagellum light brown, male flagellum length ~2× height of the eye and petal-shaped, female flagellum length ½ the height of the eye and tapering to apex. Face dark brown with yellow pile, clypeus brown, bare and slightly longer than scape and pedicel combined, mouthparts pale yellow and strongly reduced. Thorax. Iridescent green and densely covered with long yellow pile. Coxae light brown, femora light brown with apical third yellow, tibia and tarsi light brown. Lower calypter transparent covered with dense yellow pile, halter yellow. Wing. Transparent (clear or pale brown), veins brown (Fig. 13). Abdomen. Tergites iridescent brown densely covered with yellow pile; sternites brown and densely covered with yellow pile.

This species is named in honor of Dr. Lionel A. Stange, Florida State Collection of Arthropods, who collected the type series.

Body shape not arched; coloration non-metallic. Head width much narrower than thorax width; hemispherical; ocellar tubercle shape raised, rounded, two ocelli present, anterior ocellus absent; postocular ridge and occiput rounded; posterior margin of eye rounded; eyes densely pilose; not contiguous above antennal base, rarely contiguous below; palpus absent; proboscis length greatly reduced, with sparse pile; antennae located on middle of frons, either nearer to ocellar tubercle or to mouthparts; flagellum elongate, slightly tapered or paddle-shaped; apex with terminal setae present or absent; scapes fused; postpronotal lobes not enlarged or contiguous medially; antepronotum narrow; subscutellum barely visible beneath scutellum; legs not elongated; tibial spines present apically; pulvilli present; wing markings and microtrichia absent; costal vein ending near wing apex; costal margin straight; humeral crossvein absent; radial veins straight; R₁ not inflated distally; R₄₊₅ originating at apex of basal cell r₄₊₅ and then forking into veins R₄ and R₅ (Fig. 36); crossvein 2r-m present between M₁ and R₄₊₅, bisecting cell r₄₊₅; cell formed by 2r-m narrow, elongate; R₄ without spur vein; M₁, M₂ and M₃ present (M₃ fused with CuA₁), rarely one M vein or two M veins present, all typically reaching wing margin; discal cell closed; cell m₃ present, CuA₁ joining M₃ and running towards margin; CuA₂ fused to A₁ before wing margin and running towards margin; anal lobe well developed; alula weakly developed; abdomen greatly rounded, inflated; tergites smooth, rounded.

Pialea is a relatively rare South American genus that comprises four species described from Brazil and another one described from Ecuador. The genus was described by Erichson (1840) for his new species Pialea lomata from Brazil. Later, Westwood (1876) named a second species, Pialea lutescens, also from Brazil. Two more species from the Oriental Region were later described in this genus, Pialea jardinei and Pialea auripila (Brunetti 1912), but they were subsequently transferred to Astomella Latreille, 1809and Astomelloides Schlinger, 1959, respectively (Schlinger 1956, 1959). Schlinger (1956) revised the genus and described three more species, Pialea antiqua, Pialea capitella and Pialea ecuadoriensis. Pialea is presumably closely related to Stenopialea Speiser, 1920 (a South African endemic genus) and Archipialea Schlinger, 1973 (Chile) based on antennal and wing characters (Schlinger 1973; Barraclough 1985). Pialea are characterized by the fusion of the scapes and the dichoptic eyes (except in Pialea capitella). Species in this genus also show strong sexual dimorphism in the length, insertion and shape of the antennae, the length of the abdomen and the color and maculation of the body.

Holotype female: Top label: “Venezuela / Páramo / La Negra / Lichy col. / [vertically on left side] viii.48”. Bottom label: red “HOLOTYPE ♀/ Pialea brunea/ Schlinger new species/ Det. E.I. Schlinger 2012” (CAS).

Antennae inserted in the middle of the head (female, Fig. 17); post pedicel longer than head height (Fig. 18); body entirely brown, without yellow markings; R₂₊₃ not reaching wing margin (Fig. 19); M₂ present; first tarsomere of hind leg much longer than the remaining tarsomeres combined.

Female holotype with medium body size (Fig. 16, female body: 9.2 mm) and wing shorter than body (female wing: 8.2 mm). Head. Eyes black and densely covered with long (equal to length of scape) brown pile (Fig. 17), occiput and ocellar tubercle dark brown and covered with brown pile, ocelli brown, frons brown, scape and pedicel brown, pedicel with several long setae, flagellum brown and tapering to apex which bears setae (Fig. 18). Face dark brown with brown pile; clypeus dark brown, half the length of the scape and covered with fine setae; mouthparts light brown and strongly reduced. Thorax. Uniformly light brown and densely covered with long brown pile. Legs brown and densely covered with long brown pile. Lower calypter brown and densely covered with yellow pile; halter light brown. Wing. Transparent with light brown wing veins (Fig. 19). R₂₊₃ incomplete, not reaching wing margin, M₁ absent, M₂ present. Abdomen. Both tergites and sternites uniformly dark brown.

Pialea brunea is closely related to Pialea capitella Schlinger, 1956 and Pialea ecuadorensis Schlinger, 1956, sharing with these species the absence of wing vein M₁. It differs from Pialea capitella in the eyes being separate below the antennae, and from Pialea ecuadorensis in the overall brown coloration and presence of M₂.

The specific epithet is derived from the Latin, bruneus – brown; referring to the distinctive entirely brown coloration of the body, which lacks yellow markings.

Figure 16.

Pialea brunea Schlinger sp. n., female holotype, lateral view. Scale bar = 1.0 mm.

Figure 17.

Pialea brunea Schlinger sp. n., female holotype, anterior view. Scale bar = 1.0 mm.

Figure 18.

Pialea brunea Schlinger sp. n., female, head, lateral view. Scale bar = 1.0 mm.

Figure 19.

Pialea brunea Schlinger sp. n., wing. Scale bar = 1.0 mm.

Holotype male: Top label: “VENEZUELA / Mérida, 3500 m. / Páramo Mucubaji / nr. Laguna Negra”. Second label: “29.iv-3.v.81 / Malaise trap / L. Masner / 8115”. Third label: bright green “ACROCERIDAE/ E.I. Schlinger/ Specimen #/ 004215”. Bottom label: red “HOLOTYPE ♂/ Pialea corbiculata/ Schlinger new species/ Det. E.I. Schlinger 2012” (CAS).

Antennae inserted in the middle of the head (male); post pedicel as long as the head height; head, thorax and scutellum black; legs and abdomen black with yellow markings; hind leg with tibia and first tarsomere swollen (Figs 20, 22), twice as wide as the second tarsomere; additional r-m crossvein (2r-m) present.

Male holotype with medium body size (Fig. 20, male body length: 7.3 mm) and wing longer than body (male wing: 8.6 mm). Head. Eyes black and densely covered with dark brown, long (equal to scape length) pile (Fig. 21), occiput and ocellar tubercle dark brown and densely covered with long dark brown pile, ocelli light brown, frons dark brown, scape and pedicel dark brown, pedicel with yellow setae, flagellum light brown, lacking apical setae. Male flagellum petal like, length ~2× length of scape and pedicel combined. Face dark brown with brown pile, clypeus dark brown, with light brown pile and shorter than scape, mouthparts dark brown and strongly reduced. Thorax. Dark brown and densely covered with long brown pile (Fig. 22). Coxae dark brown, femora yellow with apex of ventral surface brown, tibia yellow with apex brown, tarsi brown, hind leg longer than fore- and mid-leg and with tibia and first tarsomere swollen (twice as wide as mid-leg). Lower calypter brown and densely covered long brown pile, halter brown. Wing. Transparent light brown with brown wing veins; M₁ and M₂ present. Abdomen. Densely covered with light brown pile (Fig. 22). Tergite I and VI brown, tergites II-V yellow with anterior margin and medial line brown; sternites I and VI brown sternite II–V yellow.

Pialea corbiculata sp. n. is closely related to Pialea lutescens Westwood, 1876 and Pialea antiqua Schlinger, 1956, based on the presence of wing vein M₁. It differs from those two species by the swollen tibia and first tarsomere of the hind leg and the presence of an additional r-m crossvein (2r-m), which are unique features within Pialea.

The species epithet, corbiculata, is in reference to the swollen hind tibia and tarsi which resemble the pollen collecting corbicula of many bees.

Figure 20.

Pialea corbiculata Schlinger sp. n., male holotype, lateral view. Scale bar = 1.0 mm.

Figure 21.

Pialea corbiculata Schlinger sp. n., male holotype, anterior view. Scale bar = 1.0 mm.

Figure 22.

Pialea corbiculata Schlinger sp. n., male holotype, dorsal view. Scale bar = 1.0 mm.

Figure 23.

Pialea corbiculata Schlinger sp. n., wing. Scale bar = 1.0 mm.

Figure 24.

Distribution of Sphaerops micella Schlinger sp. n.(black squares), Sphaerops appendiculata Philippi, 1865. (red squares), Neophilopota brevirostris Schlinger sp. n. (green triangle), Coquena stangei Schlinger sp. n.(orange star), Pialea brunea Schlinger sp. n. (blue circle) and Pialea corbiculata Schlinger sp. n. (green circle).

Figure 25.

Terphis nodosa Erichson, 1840, female, lateral view. Scale bar = 1.0 mm.

Figure 26.

Philopota conica Wiedemann, 1830, female, head, anterior view. Scale bar = 1.0 mm. clyp clypeus fc face flg flagellum frn frons lfm lower facial margin oc tr ocellar triangle ped pedicel pocl r postocular ridge scp scape.

Figure 27.

Philopota conica Wiedemann, 1830, female, head, lateral view. Scale bar = 1.0 mm. clyp clypeus fc face fgl flagellum frn frons lab labium lbr labrum lfm lower facial margin ped pedicel premnt prementum pocl r postocular ridge scp scape vrt vertex.

Figure 28.

Pialea antiqua Schlinger, 1956, female, wing. Scale bar = 1.0 mm.

Figure 29.

Pterodontia davisi Paramonov, 1957, female, wing. Scale bar = 1.0 mm.

Figure 30.

Pialea lomata Erichson, 1840, head, dorsal view. Scale bar = 0.5 mm

Figure 31.

Pialea antiqua Schlinger, 1956, head, dorsal view. Scale bar = 0.5 mm.

Figure 32.

Pialea antiqua Schlinger, 1956, male, lateral view. Scale bar = 1.0 mm.

Figure 33.

Pialea antiqua Schlinger, 1956, female, lateral view. Scale bar = 1.0 mm.

Figure 34.

Pialea antiqua Schlinger, 1956, male, head, lateral view. Scale bar = 1.0 mm.

Figure 35.

Pialea lomata Erichson, 1840, male, lateral view. Scale bar = 1.0 mm.

Figure 36.

Pialea lomata Erichson, 1840, wing. Scale bar = 1.0 mm.

Figure 37.

Villalus chilensis Cole, 1918, wing. Scale bar = 1.0 mm.