Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 70. (Budapest 1978)

Kovalev, V. G.: Mongolian species of the Platypalpus albiseta-group (Diptera, Empididae)

subshining, with a trace of microscopic pile. Two last segments subequal in length, black; segment 7 polished, sternite with a dusted median stripe; segment 8 dusted greyish with lateral margins polished. Segment 7 cylindrical with hind angles of tergite and sternite somewhat produced. Segment 8 conical, sternite longer than tergite. Cerci greyish, about as long as segment 8. Length 2.3 mm, wing 2.6 mm. Holotype, çf : Gobi Altaj aimak, Quelle Chajchi bulak, 60 km SW von Bugat, 19. 7. 1970, leg. NARTSHUK. — Paratype: Gobi Altaj aimak, 15 km WNW von Zachuj, 16. 7. 1970, leg. KERZHNER, 1 9 (type material deposited in the Zoological Institute, Leningrad). Note. — This species stands comparison only with the North European P. albisetoides CHVÁLA, which also has shining mesonotum and mesopleura, while humeral calli and propleura are covered with pile. P. albisetoides is distinguished from leucarista by its short antennái segment 3, only three times as long as wide, mid femora very stout, more than twice as wide as fore femora; male genitalia quite different (see description of leucarista). 6. Platypalpus kaszabi sp. n. (Figs. 14-17) Yellow species. Thorax dusted grey, only anterior margin of mesonotum and a patch on sternopleura shining; mesonotum with a dark median stripe. cf (holotype). Head black, dusted grey. No silvery triangular patch behind ocellar triangle. Frons very narrow, below middle narrower than front ocellus, slightly widening above and before ocellar triangle as wide as distance between hind ocelli. Vti and oc pale yellow, hairs whitish. Antennae brown on two basal segments; segment 3 black (it is missing). Palpi yellow, clothed with whitish pile, apically with a pale bristle. — Thorax reddish yellow with mesonotum and pleura densely pale grey dusted. Pronotum at about middle with a small blackish patch. Mesonotum with a black median stripe extending over entire length; sides of mesonotum behind humeri, prescutellar depression and postalar calli brownish; scutellum dark brown with paler hind margin (Fig. 17); mesophragma blackish; pleurotergitesyellowish brown; dark pattern on mesonotum somewhat dull from a coating of dust. Front margin of mesonotum between humeral calli polished, sternopleura with a rather small polished patch in front. Mesonotum at a certain incidence of light with indication of two darker stripes between acr and dc rows; median stripe of paler dust including acr 3-4 times wider than dark lateral stripes and a little wider than median dark stripe on ground colour. Humeral calli rather more developed than in albiseta. Bristles pale yellow, hairs whitish. Acr and dc minute, former irregularly 6-serial, latter uniserial but not easily distinguished from dense hairs along sides of thorax; dc ending behind in one pair of fine prescutellar bristles; sparse hairs in prescutellar depression. One notopleural with a smaller bristle and a few hairs in front. — Wings hyaline. Veins yellow. Costal bristle yellow. Apical sections of R

i+5 and M

]+2 slightly S-shaped (vein M

1+2 more conspicuously), divergent on basal half, slightly convergent apically but parallel just before tip, 1.3 times as wide apart at middle than at tip. — Legs yellow; whole of fore tarsi, mid tarsi from tip of metatarsus and last four segments of hind tarsi blackish or brownish black. Fore femora 2.5 times wider than tibiae, posteroventrally over whole length with a dense row of erect hairs, anteroventrally with a few similar hairs only at about base. Mid femora very little stouter than fore pair, anteroventrally with a few erect hairs being slightly longer than general pubescence of femur, posteroventrally with a row of 7-8 bristly hairs of moderate length (longer than half of width of femur). Hind femora ventrally with two rows of hairs, those of anterior row subequal over whole length of femur, of posterior row longest on apical half of femur; longest hairs of these two rows longer than half of length of femur. Tibiae simple. Mid tibiae with no apical projection. Longer hairs and bristles on legs yellow, other pubescence dense and whitish. — Abdomen blackish brown above; anterior margin of each tergite with a narrow border clothed with sparse greyish pile; these borders widened laterally and interrupted near middle line of all tergites except on 1 or 2 basal segments. Abdomen clothed with pale long hairs, longest especially on hind margins of last visible sternite. — Genitalia (Figs. 14-16) of moderate size, not broader than end of abdomen, almost globular, of rich yellow colour, clothed with sparse white microscopic pile; left margin of right periandrial lamella with narrow blackish border. 9 (paratypes). Antennái segment 3 long, 3.6-4.0 times as long as wide ; arista slightly thickened, 1.5-1.6 times as long as segment 3. Abdomen without greyish markings except on base of segments 1 and 2. Segments 7 and 8 pale brown, partly hidden. Segment 7 simple, tergite shining with side and hind margins dull and pale; entire sternite dusted greyish. Visible parts of segment 8 dull, but side margins of sternite shining; sternite longer than tergite; hind angles of the former produced; hind margin of the latter straight.