Teuchophorus crobylotus, Meuffels & Grootaert, 2004

Meuffels, Henk & Grootaert, Patrick, 2004, The genus Teuchophorus in South-East Asia and New Guinea, description of new species, species-groups and their phylogeny (Insecta, Diptera, Dolichopodidae), Journal of Natural History 38 (2), pp. 143-258 : 162-164

Species 8: Teuchophorus crobylotus sp. nov. (male)

(figures 38–47)

Etymology. The name alludes to the tuft on ventral hairs on the hind tibia [from Greek króbylos ‘tuft of hair’].

Diagnosis. Medium-sized species with feebly thickened costa. Mid femur with two strong black ventral bristles near base; mid tibia with a strong median av among other bristles. Hind tibia at basal third ventrally with a black comb of thickly set hairs.

Material examined. Type material: Papua New Guinea, Madang province, Baiteta , along a brook in a primary rain forest, 25 May 1995,    male and      male (No. 95069; leg. P. Grootaert) .

Male

Body length 1.7 mm; wing length 1.2 mm.

Head. Frons broad, with blackish green ground colour, shining. Face concolorous with frons, rapidly narrowing downwards; eyes touching each other at a point just below middle of face. Palpi yellowish, darkened on upper surface, with a short black bristlet. Rostrum brownish yellow. Occiput greenish black. Chaetotaxy as usual; two minute postocellars. Postocular cilia uniseriate, black, very short below. Antenna (figure 38): short, dark brown; tip of third segment lighter coloured. Third segment triangular, rather pointed, slightly shorter than deep. Arista nearly three times as long as antenna; basal aristal segment a little longer than third antennal segment.

Thorax. Mesoscutum and scutellum greenish black, shining. Pleurae dark brown, with a small black spot on metapleurae. Neck yellowish. Chaetotaxy as usual; acr uniseriate; scutellum with two marginals. No propleural bristle.

Legs. Legs, including coxae, yellow. Hind femur darkened, except base; basal half of hind tibia slightly darkened.

Fore leg. Coxa with a row of brownish yellow bristly hairs. Femur with a very small preapical pv. Tibia without bristles or serration. Length of tibia and tarsal segments (in mm): 0.37: 0.2:0.09: 0.07:0.06:0.06.

Mid leg. Coxa with a few short brownish yellow hairs near tip. Femur (figure 40) ventrally near base with two black bristles, the second of which is longer than the diameter of the femur; at about three-quarters from base an upright, thin but rather long seta; posteroventrally on apical half a row of short hairs, growing longer towards tip of femur. Tibia (figure 40) with a rather long black av at middle; a similar av near tip, and a much thinner but equally long hair-like av at about one-third from base; two ad (at one-quarter and at four-fifths from base), one pd (at one-third), and a very small pd near tip; a circlet of rather weak apicals. Hairs on posteroventral side of first tarsal segment somewhat lengthened. Length of tibia and tarsal segments (in mm): 0.495:0.25: 0.15: 0.07:0.06: 0.06.

Hind leg. Coxa with a small black exterior bristle. Femur (figure 39) with a very shallow excavation on middle third; on apical third a row of short posteroventral hairs, and a few hair-like av. Tibia (figure 39) gently curved; basal half more slender than apical half, with ventrally at about basal third of tibia a small thickening, bearing a conspicuous, partly doubled, short comb of closely set black hairlets; between this comb and base of tibia a number of short anteroventral and anterior hairs. The thicker apical half of tibia bears slightly lengthened hairs, and a moderately strong black dorsal bristle. Length of tibia and tarsal segments (in mm): 0.51: 0.13: 0.2: 0.15: 0.1: 0.065.

Wing. Wing (figure 41) hyaline. Costa feebly thickened. Halters with yellow stem and brown knob. Squamae yellowish with narrowly darkened border and few, short black cilia.

Abdomen. Abdomen dark brown with yellowish incisions. Hairs and bristles very short, black. Hypopygium (figures 42–47) small, dark brown; aedeagus with seven finger-like protuberances.

Female Unknown.