Neohybos bicolor, 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 : 35-37

Neohybos bicolor sp. n.

( Figs. 1–8 , 74 )

Diagnosis. Thorax black, pruinose except for a small area on postpronotal lobe; scutum rust-colored pruinose, pleurae gray pruinose; thoracic setae brown, short and scattered; wing brownish with brown stigma; legs black except brown fore tibia, mid tibia pale-brown and tarsomeres 1 and 2 yellow; hind femur slender; abdomen and legs clothed in yellow bristles.

Description. Holotype male. Body: 4.2 mm. Wing: 4.8 mm. Antenna placed above middle of head; postpedicel oval, 2.5 times longer than wide, as long as scape and pedicel combined. Face narrowly dichoptic, shorter than frons. Pair of ocellar setae slender and divergent. Postcranium with scattered gray pruinescence; occipital setae uniserial, short and sparse.

Thorax black, entirely pruinose except small area on postpronotal lobe, pruinescence rust-colored on scutum and grayish on remaining parts, more dense on mesopleuron; thoracic setae short, brown, scattered; acr and dc uniserial; 2 npl shorter than apical scutellar pair; scutellum with 1 apical pair long and divergent and 3 thin lateral pairs one- to two-thirds length of apical pair.

Wing ( Fig.74 ) narrow; homogeneously brownish; stigma brown; R4+5 and M1 parallel.

Legs black except brown fore tibia, mid tibia pale-brown and first and second tarsomeres yellow. Hind femur slender, just discreetly inflated distally; hind tibia tubular. Outstanding bristles: fore tibia with 1 long posterior preapical bristle reaching half length of corresponding tarsomere 1 and 1 short anterior preapical bristle; mid tibia with 3 elongate, somewhat thickened anterodorsal bristles (1 at middle, 1 at basal quarter and 1 sub-basal) and 1 long ventral apical bristle reaching apex of corresponding tarsomere 1; mid tarsomere 1 with 1 long posteroventral bristle near base reaching base of second tarsomere; hind femur with 1 dorsal bristle on distal fifth, 1 anterodorsal preapical and 1 anterior bristle on distal quarter, 10 spine-like and elongate anteroventral bristles along entire length, 17–18 spine-like ventral bristles as long as anteroventral series, becoming shorter toward apex of femur, 6 developed posteroventral bristles (1 sub-basal and 5 on distal third); hind tibia with 4 long, thin dorsal bristles, 1 long and strong anteroapical bristle reaching half length of tarsomere 1, 1 short and strong posterior preapical bristle. Hind trochanter lacking thorns.

Abdomen 2.5 times longer than thorax length; shiny-black with gray pruinescence on Tg1, base of Tg2 and margin of Tg8; sternites with brown–rust-colored pruinescence; yellow and thin bristles, longer on T1–T3 and on distal margin of St8. Terminalia ( Figs 1–5 ): right bacilliform sclerite with long pointed process in middle; left postgonite enlarged, triangular; left ejaculatory apodeme twice longer than right ejaculatory apodeme; phallus with two long spine-like projections near apex; hypandrium with complete, thin dorsal bridge; hypandrial lobes pointed apically, right lobe more than twice length of left lobe.

Female. Similar to male except for: hind femur with 5 spine-like anteroventral bristles on distal half, 1 anteroventral bristle on basal quarter longer than distal bristles and 1 weak, short, yellow anteroventral subbasal bristle; 8 short ventral thorns on distal third; 4 spine-like posteroventral bristles on distal third and the remaining bristles long and slender; anterodorsal bristles lacking. Terminalia ( Figs. 6–8 ): Tg8 subdivided into basal horizontal and median longitudinal sclerites; St 8 with developed sub-basal projection, bilobed distally and strongly sclerotized on each side.

Distribution. Ecuador.

Type material. Holotype male: ECUADOR: Tunguruhua , Banos 2000–2500, 9.x.1978, M. Cooper, BM1995 E-90 ( BMNH) . Paratypes: same data, 1 male ( INPA) , 1 female ( BMNH); 20.xi.1978, 1 female ( INPA) .

Etymology. The specific name refers to the pruinescence color pattern of the thorax.

Figures

FIGURES 1–8. Terminalia of Neohybos bicolor, sp. n. 1–5, male: 1, epandrium and cerci, dorsal view; 2, epandrium, ventral view (apex of hypandrium outlined); 3, 4, left and right epandrial lamellae, lateral view; 5, hypandrium, ventral view. 6–8, female: dorsal, lateral and ventral views. Figs 1–5; 6–8 in the same scale.

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.