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

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

KASZAB (deposited in the Hungarian Natural History Museum, Budapest) — Paratypes: Bajanchongor aimak, Oase Echin gol, 11-14.8. 1967, leg. ZAITZEV, 1 Ç (deposited in the Zoological Institute Academy of Sciences of the USSR, Leningrad); Südgobi aimak, Tachilga ul Gebirge, zwischen Somon Cogt-Ovoo und Dalanzadgad, 68 km S von Cogt-Ovoo, cca 1550 m, 8. 7. 1967 (No. 900), leg. KASZAB, 1 rf (deposited in the Zoological Museum, Moscow State Unversity). Note. — Only two real Palaearctic species of the albiseta-group, P. bipunctatus sp. n. and P. kaszabi sp. n., have yellow thorax. Besides, there is a single female specimen from Rehoboth (Israel) identified by ENGEL (1939, p. 53) as a yellow form of P. albiseta. This form may be a distinct species and at present it is unidentifiable. P. kaszabi differs from P. bipunctatus in having mesonotum dusted greyish with a black median stripe and without black patches above bases of wings. "P. albiseta'" from Rehoboth has polished mesonotum with two dark patches as in bipunctatus, but with a black median stripe. P. bipunctatus may be closely allied to some species distributed in the Oriental Region and in adjacent countries of the Palaearctic Region; P. nepalensis BRUNETTI is closely related, but it has two black mesonotal patches joined together near posterior margin of mesonotum, moreover, in nepalensis pleura are grey and the male genitalia is black (BRUNETTI 1920). 2. Platypalpus sp. prope bipunctatus sp. n. — Gobi Altaj aimak, Quelle Chajchi bulak, 60 km SW von Bugat, 19. 7. 1970, leg. NARTSHUK, 1 9 ; head is missing. Differs from bipunctatus in having humeral calli, propleura and base of scutellum blackish. 3. Platypalpus argenticapillatus sp. n. (Figs. 6-9) Black species with polished mesonotum, humsral calli and pleura. Apical sections of R

i+ and M

1+2 slightly convergent towards tip. Fore femora posteroventrally with yellow bristly hair and without long black bristles. cf (holotype). Head greyish dusted as in P. albiseta and P. bipunctatus ; occiput with a silvery triangular patch behind ocelli. Frons below middle as wide as front ocellus, and immediately before this ocellus a little wider than distance between hind ocelli. Bristles blackish; vti more than twice as long as oc. Upper part of occiput clothed with fine blackish hairs becoming longer and pale yellow above mouth. Antennae black; segment 3 five times as long as wide; arista 1.35 times as long as segment 3, slightly thickened. Palpi yellowish, apically with a yellow bristle. — Thorax mostly polished black; side margins of mesonotum from polished humeral calli to scutellum and narrow hind margin of mesonotum dusted grey; scutellum and metathorax thinly grey dusted. Most of pleura polished (Fig. 6); prothorax (except for extreme upper and lower parts), upper margin of mesopleura and front part of their lower margin, front margin of mesopleura (excluding a small area before middle), whole of sternopleura and hypopleura except for posteroventral angle with a covering of greyish dust. Humeral calli only very slightly developed. Thoracic bristles brownish, hairs yellow, scattered. Mesonotum almost bare; acr practically absent except for one or two scarcely visible pairs. Dc uniserial ending behind in one bristle. 1 notopleural bristle present. — Wings clear. Veins brown. Costal bristle black. Apical sections of R

i+S and M

1+2 divergent in basal half but only slightly convergent towards tip, 1.4 times as wide apart at middle than at tip. Squamae pale with yellow fringes. — Legs a rich yellow colour; fore tibiae (except at base), whole of fore tarsi, mid tarsi from tip of metatarsus and hind tarsi on last three segments brown ; tips of two basal segments of hind tarsi darkened. Fore femora 2.2 times wider than tibiae, ventrally with two rows of pale yellow hairs, those of anterior row longest on basal third (longer than half of width of femur); hairs of posterior row bristle-like over whole length of femur; three hairs of this row much longer than others, but not as long as femur is wide. Mid femora stout, 1.6 times as wide as fore ones, in front over whole length with a row of 7 yellow erect bristly hairs, anteroventrally with a row of 8 similar hairs, posteroventrally with a row of 7-8 long (about as long as femur is wide) brown bristles. Hind femora ventrally with two rows of pale hairs longest on apical half; posterodorsally about middle of femur a few long hairs. Tibiae slender, simple. Mid tibiae apically with a small rim-like projection. Other pubescence on legs scanty and pale. — Abdomen shining black, clothed with scattered minute pale hairs. — Figs. 6-9. Platypalpus argenticapillatus sp. n., holotype: 6 = thorax, lateral. Male genitalia: 7 = left periandrial lamella with leftcercus, 8 = periandrium withcerci, dorsal, 9 = right periandrial lamella, ventral (scale 0.1 mm)