Neohybos brunnescens, Ale-Rocha, 2007

Ale-Rocha, R., 2007, New species of Neohybos Ale-Rocha & Carvalho (Diptera, Hybotidae, Hybotinae) from Colombia, Ecuador and Peru, Zootaxa 1503, pp. 33-54 : 37-38

Neohybos brunnescens sp. n.

( Figs. 9–13 , 75 )

Diagnosis. Thorax black with copper colored dorsal pruinescence, except for small area on postpronotal lobe, and pleura with gray pruinescence; thoracic setae brown, short and scattered; wing evenly brownish, slightly more colored on basal half; legs with coxae black, fore tibia brown, mid tibia pale-brown, hind tibia palebrown to yellow at basal third, becoming darker towards apex, tarsomeres 1 and 2 yellow, tarsomeres 3 to 5 black; abdomen and legs clothed in yellow bristles.

Description. Holotype male. Body: 4.2 mm. Wing: 4.3 mm. Antenna placed in middle of head; postpedicel oval, 2.5 times longer than wide, subequal in length to scape and pedicel combined. Face narrowly dichoptic, shorter than frons. Pair of ocellar setae slender and divergent. Postcranium with sparse grayishbrown pruinescence; occipital setae short, sparse.

Thorax black, entirely pruinose except for small area on postpronotal lobe, scutum with copper-colored pruinescence and pleura with gray pruinescence; thoracic setae short, brown, scattered; acr and dc uniserial; 2 npl as long as apical scutellar pair; scutellum with 1 apical pair rather short and divergent and 4–5 thin lateral bristles, two-thirds to half length of apical pair.

Wing ( Fig. 75 ) narrow, evenly brownish, slightly more darkened on basal half; stigma brown; R45 and M1 parallel.

Legs with coxae black, fore tibia brown, mid tibia pale-brown, hind tibia pale-brown to yellow at basal third, becoming darker apically, tarsomeres 1 and 2 yellow, tarsomeres 3–5 black. Hind femur thickened, 4.5 times longer than wide; hind tibia tubular. Outstanding bristles: fore tibia with 1 long anterior preapical bristle reaching half length of corresponding tarsomere 1, 1 short posterior preapical bristle; mid tibia with 3 elongate anterodorsal bristles (1 basal, 1 at basal quarter and 1 at middle), 1 very long ventroapical bristle reaching base of tarsomere 2; mid tarsomere 1 with long posteroventral bristle near base reaching base of tarsomere 2; hind femur with 1 dorsal and 1 anterior bristles on apical quarter, 1 anterodorsal preapical, 10 developed spine-like anteroventral bristles, ventral surface with 16 bristles, those 7 more distal becoming short spines, posteroventral surface with 1 short sub-basal bristle and 5 elongate bristles on distal half; hind tibia with 5–6 long thin dorsal bristles and 1 elongate anterior preapical bristle crossing half of corresponding tarsomere 1. Hind trochanter lacking thorns.

Abdomen 3 times longer than length of thorax; brown; Tg1, base of Tg2 and Tg8 with scattered brown pruinescence; bristles yellow and thin, longer on lateral margins of Tg1–Tg3, numerous very thin and long bristles on distal margin of St8. Terminalia ( Figs. 9–13 ): right bacilliform sclerite with wide, long longitudinal process with sharp tubercle in middle, bearing two long and thick thorns apically; hypandrium with complete, slender dorsal bridge; hypandrial lobes subequal in length; postgonites narrow, ribbon-like.

Female: unknown.

Distribution. Colombia.

Type material. Holotype male (dissected): COLOMBIA: Culva of LosEuacharis Huila, 14–21.v. 1976, M. Cooper ( BMNH).

Etymology. The specific name is derived from the Latin brunnescens = brown-clear, in reference to the general coloration of the body.

Figures

FIGURES 9–13. Male terminalia of Neohybos brunnescens, sp. n.: 9, epandrium, ventral view (apex of hypandrium outlined); 10, epandrium and cerci, dorsal view; 11, 12, left and right epandrial lamellae, lateral view; 13, hypandrium, ventral view.

FIGURES 74–81. Wings of Neohybos: 74, N. bicolor sp. n.; 75, N. brunnescens sp. n.; 76, N. colombiensis sp. n.; 77, N. cooperi sp. n.; 78, N. cupreus sp. n.; 79, N. elegans sp. n.; 80, N. fuscipes sp. n.; 81, N. tenuis sp. n.