Platypalpus odintsovi sp. nov. (Figs 17–19) Type material. HOLOTYPE, ♂ labelled [printed in Cyrillic], [RUSSIA], “Krasnodarskiy kray/ Goryachiy Kluch'/ okr. pos. [= vicinity of village] Oktyabrskiy, r. [= river] Mokry/ Sepsil, 44º32'N, 39º11'E / 29.v.2013, Kustov S.Yu./ Gladun V.V.” (ZIN). PARATYPES: RUSSIA: same data as holotype (1 ♂, 2 ♀, KSU; 4 ♀, ZIN; 2 ♀, RBINS); same data as holotype, 13.v.2012, coll. Kustov S.Yu (1 ♂, ZIN). Recognition. Species of the P. pallidiventris-cursitans group; occiput with 1 pair of yellowish verticals; antenna with yellow scape and pedicel, postpedicel black, nearly 2.5X longer as wide; palpus yellow; thorax with yellowish bristles, 2 notopleurals, katepisternum entirely pollinose; legs almost entirely yellow, only last tarsomere of all tarsi brown; abdomen with black tergites and yellow sternites. Description. Male. Body length 2.7–2.9 mm; wing length 3.6–3.9 mm. Head black. Occiput densely grey pollinose; with 1 pair of pale inclinate verticals; upper part of occiput with whitish bristly hairs becoming longer on lower part. Ocellar tubercle greyish pollinose, with moderately long anterior and minute posterior setae. Frons narrow, almost parallel-sided, greyish pollinose. Face narrow, nearly as broad as frons, densely silvery grey pollinose, slightly widening below; clypeus silvery grey pollinose. Antenna with scape and pedicel yellow, postpedicel entirely brownish black; postpedicel conical, nearly 2.5X (holotype 2.4) longer than wide; stylus black, short pubescent, nearly twice longer than postpedicel. Proboscis dark brown, nearly twice shorter than head is high. Palpus yellow, large, oval, broader than proboscis, with 2 whitish, long, subapical bristly hairs, faintly whitish pubescent. Thorax with mesonotum densely yellowish grey dusted; pleura densely silvery grey pollinose including katepisternum (= sternopleuron); with yellowish bristles. Postpronotal lobe with 1 moderately long and several minute setae. Mesonotum with 2 notopleurals (anterior shorter, posterior longer), 1 moderately long postalar and 4 scutellars (apical pair long, cruciate, lateral pair short); acrostichals small, pale, arranged in 2 broad almost regular rows; dorsocentrals mostly as long as acrostichals, biserial, 2 prescutellar pairs long. Legs almost entirely yellow, only last tarsomere of all tarsi brownish. Fore femur slightly thickened, with very short anteroventral and posteroventral setae. Fore tibia spindle-shaped, with short setae ventrally and with some short brownish bristly hairs dorsally. Mid femur moderately thickened, with double row of short black spines ventrally and with row of moderately long posteroventral bristles. Mid tibia slender; tibial spur large, pointed, black at tip. Hind legs long and slender, covered with only short pale hairs. Tarsi of all legs unmodified. Wing slightly yellowish, with yellowish veins. One moderately long costal seta. Veins R4+5 and M1+2 evenly bowed and strongly convergent near wing margin; CuA2 slightly S-shaped. Crossveins m-cu and r-m contiguous. Calypter yellow, with yellow setae. Halter yellow. Abdomen with black tergites and yellow sternites, covered with fine pale hair-like setae of different lengths; almost all tergites (except tergite 7) densely greyish pollinose leaving shining triangular patch posteriorly; sternites entirely grey dusted. Terminalia (Figs 17–19) moderately large, shining black, subglobular. Right cercus (Fig. 18) rather digitiform, evenly broadened toward apex, rounded apically, not extending beyond apex of left epandrial lamella, with ordinary setae of different lengths; left cercus longer than right cercus, not extending beyond apex of left epandrial lamella, broader than right cercus but narrowed on about apical fourth, rather broad viewed laterally, with ordinary setae of different lengths. Right epandrial lamella (Fig. 17) drop-like (ventral view), with short numerous setae over lower margin and tuft of several moderately long setae subapically; right surstylus rather large, digitiform, rounded apically, with some ordinary setae longer on lower margin. Left epandrial lamella (Fig. 19) subtriangular, evenly narrowed toward apex, with numerous long pale yellow setae over lower margin and some shorter and sparser setae on upper margin subapically. Female. Resembling male; tarsomeres 1–4 slightly darkened apically, fore tibia slender; tergite 7 entirely densely pollinose; cercus long, slender, with short pale hairs. Etymology. This species is named after Stanislav Odintsov (Krasnodar, Russia) who assisted during trip where the new species was collected. Distribution. PALAEARCTIC: Russia (Krasnodarskiy Territory). Known only from submontane forest. Remarks. The new species resembles P. cursitans (Fabricius, 1775) differing from the latter by entirely brownish black postpedicel (with narrowly yellowish base in P. cursitans); by only last tarsomere of all tarsi brown (tarsomeres annulated in P. cursitans) and bicoloured abdomen, which has black tergites and yellowish sternites (abdomen uniformly black in P. cursitans).

Published as part of Kustov, Semen, Shamshev, Igor & Grootaert, Patrick, 2014, Six new species of the Platypalpus pallidiventris-cursitans group (Diptera: Hybotidae) from the Caucasus, pp. 529-539 in Zootaxa 3779 (5) on pages 537-539, DOI: 10.11646/zootaxa.3779.5.3, http://zenodo.org/record/230544