Neohybos hallexus (Smith) Smith, 2003

Ale-Rocha, R. & De Carvalho, C. J. B., 2003, Neohybos gen. nov. (Diptera, Empidoidea, Hybotinae) from the Neotropical Region, Zootaxa 387, pp. 1-16 : 8-9

Neohybos hallexus (Smith) comb. nov. ( Figs. 3–10 , 27 )

Euhybus hallexus Smith, 1963:156 , fig. 5; 1967:12 (catalogue).

Diagnosis. Body black, slender, with yellow setae; legs pale­brown to brown except tarsomeres 1,2 yellow; thoracic bristles long, acr biserial; wing with elongate costal bristles, basal third smoothly brownish, remaining hyaline, stigma lacking; abdomen elongate, about 4X length of thorax.

Holotype male. Body: 5,0 mm. Wing: 3,2 mm.

Head. Flagellum conical elongate and narrow, 4X longer than wide, slightly larger than scape and pedicel combined. Face linear, approximately as long as frons. Pair of ocellar setae long and convergent, almost vertical. Post­cranium with brownish pruinescence; postcranial setae more long than usual.

Thorax: shiny black; postpronotal lobe and postalar callus with small yellow spot; very sparse brown pruinescence on pronotum, notopleuron, above postalar callus and prescutellar disc and in margin of scutellum; mesopleuron pruinose with small shiny areas in anepisternum and anepimeron. High scutum rounded dorsally with long, slender, yellow and scattered bristles; acr biserial, dc uniserial; ial disordered and mixed with dc anteriorly. Outstanding setae: 2 very long npl; 1 pal; 1 pair of subapical scutellar bristles strong, something short, divergent and straight, and 3 lateral slender setae about half as long as subapical pair; 1 short weak propleural seta.

Wing ( Fig 27 ): long and narrow, slightly dark on basal third and hyaline on remaining; stigma hyaline; costal bristles longer than usual; anal lobe narrow; alular incision greater than 90º; R4+5 and M1 parallel.

Legs: clothed in brown bristles; coxae brown to black, trochanters, femora, tibiae and tarsomeres 3–5 brown; fore and mid tarsomeres 1–2 yellow and hind ones pale­brown. Hind femur more than 5X longer than wide, clothed with sparse pilosity; hind tibia almost straight, lacking ventral keel. Outstanding bristles: fore tibia with 1A preapical short bristle and 1P preapical bristle longer than A, equal to length of tarsomere 1, ventral row with 3 very long bristles on distal half and posterior row with bristles also long, although weaker than ventral ones; mid tibia with AD slightly strong bristles, 1A long and strong bristle on apical 2/3 reaching apex of tibia, 1V preapical long bristle reaching apex of tarsomere 1; mid tarsus with very long bristles, tarsomere 1 with 1AD and 1PD subbasal reaching apex of the tarsomere 2; hind trochanter with 1V spine­like bristle; hind femur with 1AD at middle, 1AD at distal quarter and 1AD preapical bristles, 1A in apical quarter and 7AV spine­like bristles, 12–13V short spines with discreet protuberant bases, 8PV spine­like bristles divided into 2 subbasal and 6 on apical half; hind tibia almost straight, lacking ventral keel, with some AD thin bristles, 1 PD subapical strong and 1 AV apical shorter bristle; hind tarsomere 1 with 2 AV setae being 1AV subbasal spine­like and 1 AV apical short bristles.

Abdomen slender, about 4X length of thorax; shiny black, with thin, elongate and yellowish bristles, distinctly longer laterally on Tg1 and Tg2; St 8 longer than wide. Terminalia ( Figs. 3–7 ): right epandrial lamella enlarged and convex distally in lateral view; left epandrial lamella slender; phallus robust, strongly constricted on distal third, with short spines distally; right hypandrial lobe long and slender, as long as hypandrium; hypandrial bridge incomplete, hypandrial arms not fused dorsally; postgonites simple, narrow, ribbonlike.

Female. Terminalia ( Figs. 8–10 ): eighth segment narrow, Tg8 and St8 completely sclerotizated; base of St8 with protuberance on each side; cercus short.

Distribution. Guyana; Brazil (new record), Peru (new record); Colombia (new record).

Type material. Holotype ♂: GUYANA, Kaieteur, Savannah & Environs, 3.ix.1937 (terminalia mounted on microslides; right wing lost). Paratypes: 2.ix.1937, 1Ψ; 5.ix.1937, 2ΨΨ; Haig Forest, 5.ix.1927, 1♂; 7.ix.1937, 1♂; 8.ix.1937, 1♂ e 1Ψ (all in BMNH).

Additional material. Material: PERU, [Madre de Dios], Rio Tambopata, Reserve, 30

km SW Puerto Maldonado, 19.ix­10.x. [19]84, 12 °12’S. 69° 16’W, Trop. Moist Frot, D.A Grimaldi, 1♂ ( AMNH). BRASIL, Amazonas, Manaus, Reserva Ducke AM010, Km 24, Malaise, 12–19.xii.1996, área aberta, Henriques, Ferreira & Vidal, 1♂ ( INPA); 27.viii.1982, J. Rafael, 1♂ ( INPA); Reserva da Campina, Br 174, Km 60, 13.vi.1993, varredura, J. Vidal, 1Ψ ( INPA); Campus Universitário, iii.1979, J. Rafael, 1Ψ ( INPA); Br 174, km 72, Faz. Dimona, 11–14.v.1993, F.F.Xavier, varredura, 1Ψ ( INPA); Am 0 10 km 54, BI­2, 19–29.i.1998, Igarapé mata, Malaise, 1Ψ ( INPA); 3–12.iii.1998, 1Ψ ( INPA); Presidente Figueiredo, Cachoeira Santuário, 1–7.ix.2001, Ale­Rocha, 1♂ ( INPA); Pará, Alter do Chão, 15–18.ii.1992, J. Rafael, 4 ♂, 2ΨΨ ( INPA); Rio Trombetas, Cruz Alta, 25– 29.viii.1992, varredura, J. Vidal, 2♂♂, 5ΨΨ ( INPA); Santarém, Vila Inanú, 28.xii.1994, L.S. Aquino, Malaise, 1♂ ( INPA); Maranhão, Caxias, Ponte, 045305S–432249W, 0 7– 12.iii.1997, J. Rafael & F. Oliveira, varredura, 1♂ ( INPA).

Figures

FIGURES 1 – 7. Neohybos species, terminalia. N. derodactylus comb. nov., holotype female: 1, 2, ovipositor, dorsal and ventral view. Figs. 3 – 7. N. hallexus comb. nov., paratype male: 3, epandrium, ventral view; 4, epandrium and cerci, dorsal view; 5, epandrium, right lateral view; 6, epandrium, left lateral view; 7, hypandrium, ventral view. Figs. 1 – 2; 3 – 6 in the same scale (scale bar = 0.5 mm); 7 (scale bar = 0.25 mm).

FIGURES 8 – 15. Neohybos species, terminalia. N. hallexus comb. nov., paratype female: 8, 9, 10, ovipositor, dorsal, ventral and right lateral view. Figs 11 – 5. N. leptogaster comb. nov., lectotype male: 11, epandrium, ventral view; 12, epandrium and cerci, dorsal view; 13, 14, epandrium, left and right lateral view; 15, hypandrium, ventral view. Figs 8 – 10; 11 – 14; in the same scale (scale bar = 0.5 mm); 15 (scale bar = 0.5 mm).

FIGURES 26 – 30. Neohybos species, wings: 26, N. derodactylus comb. nov.; 27, N. hallexus comb. nov.; 28, N. halteralis comb. nov.; 29, N. leptogaster comb. nov.; 30, N. luridus comb. nov.