Neohybos leptogaster (Melander) Melander, 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 : 10-12

Neohybos leptogaster (Melander) comb. nov. ( Figs. 11–18 , 29 )

Euhybos leptogaster Melander, 1927:33 ; Smith, 1967:12 (catalogue).

Diagnosis. Face narrowly dichoptic; thorax and abdomen dark­brown; thorax woolly pruinose; abdominal tergites 6–8 pruinose; coxae, trochanters, tarsomeres 4–5 and hind femur brown; tarsomeres 1–3, fore and mid femora and tibiae yellow; hind tibia pale­brown, yellow at extremities; 1 pair of posterior outstanding dc bristles; wing hyaline, stigma lacking; mid tibia with 1 long AV bristle near middle; abdomen long, about 5X length of thorax.

Lectotype male (present designation). Body: 7.0 mm. Wing: 3.9 mm.

Head. Flagellum oval small, shorter than scape and pedicel combined. Face darkbrown, shorter than frons, narrowly dichoptic. Post­cranium dark­brown with brown pruinescence; pair of ocellar setae divergent; 3 long upper postocellar bristles bent forward at basal third; occipital series with disordered, more numerous, long and scattered bristles on upper portion of postcranium, very short, almost inconspicuous on inferior half.

Thorax dark­brown; pronotum, pleurae and scutum pruinose, except small circular area in dorsocentral line before base of wing, postpronotal lobe and dorsum of scutellum shiny, lacking pruinescence; dorsum of pronotum with gold­brown tomentum; notopleuron, pleurae and margins of scutellum with grayish pruinescense. Pronotum of medium length. Scutum with short bristles; acr row irregularly biserial anteriorly; decreasing in number posteriorly and becomes uniserial on posterior half of scutum; dc uniserial although more numerous anteriorly; intralars scattered. Outstanding bristles: 1 pair of posterior dc bristle; 2–3 thin npl; 1 postalar; 1 pair of scutellar apical bristles parallel, something short and 2 weak and short lateral bristles. Propleuron with short, inconspicuous bristle.

Wing ( Fig. 29 ): narrow, hyaline, stigma lacking, anal lobe narrow, alular incision greater than 90°; R4+5 and M1 slightly convergent, almost parallel.

Legs clothed in brown bristles; coxae, trochanters, tarsomeres 4–5 and hind femur brown; tarsomeres 1–3, fore and mid femora and tibiae yellow; hind tibia pale­brown, yellow at extremities. Hind femur faintly inflated, approximately 5.8X longer than wide; hind tibia straight, lacking ventral keel. Fore and mid pulvilli whitish, twice length of claws, about 3X longer than the hind ones; hind pulvilli brown, half of length of claws. Outstanding bristles very long: fore tibia with 1A and 1P preapical as long as tarsomere 1, reaching apex of segment; mid tibia with 3AD distinctly long and robust, especially 2 basal bristles, 1AV on basal third reaching apex of tibia and 1 apical PV crossing apex of tarsomere 1; mid tarsomere 1 with 1AD and 1PV preapical, 1AD and 1PV in third, very long, besides other long and thin bristles; hind trochanter with 1V short spine and 1PV spine­like bristle; hind femur with 8 AV spine­like bristles, 13 V thorns with protuberant bases, 3 PV more apical spine­like bristles, 2 long thin bristles on distal third and 8 spines with very protuberant bases on basal 2/3 of femur.

Abdomen: dark­brown with thin, pale­brown bristles; very long and thin, about 5X length of the thorax; Tg6–8 short and pruinose; Tg1 and Tg2 with long bristles laterally, remaining bristles very short and scattered; sternites pilose with elongate bristles, increasing in length on more distal sternites; distal margin of St8 with long and wavy bristles. St6–8 densely pruinose, St5–4 sparsely pruinose; segments 2–4 tubular, 5X as long as wide. Terminalia ( Figs. 11–15 ): pruinose, with long bristles; hypandrium long and slender, right hypandrial lobe wide, almost half of width of hypandrium and as long as hypandrium; dorsal bridge complete; left postgonite widened.

Female. Similar to male except as follows. Abdominal pruinescence starting from Tg7; spine­like bristles of hind femur reduced, 6 AV more slender than in male, 9 AV occupying distal half, PV row with 3 robust preapical bristles and remaining thin and elongate; hind trochanter lacking thorns. Terminalia ( Figs. 16–18 ): ninth segment with large basal protuberance on each side. Tg9 and St9 triangular, wide basally and narrowed gradually towards apex; Tg9 with small medium protuberance near base.

Type material. Lectotype ♂: COSTA RICA, [Cartago], La Suisa, April 1922, Pab Schild; Type, Euhybos leptogaster Mel ( USNM). Condition: antenna, fore and mid leg and right wing lost, terminalia in tube with glycerin. Paralectotype: same data as lectotype, 1Ψ ( USNM). Conditions: head, fore legs, left mid leg and right hind leg lost; terminalia in tube with glycerin, right wing mounted on microslide.

Figures

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 16 – 20. Neohybos species, terminalia. N. leptogaster comb. nov., paralectoype female: 16, 17, 18, ovipositor, dorsal, ventral and left lateral view. Figs. 19 – 20. N. luridus comb. nov., male: 19, epandrium and cerci, dorsal view; 20, epandrium, ventral view. Figs 16 – 18; 19 – 20 in the same scale (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.