Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 75. (Budapest 1983)

Roháček, J. ; Papp, L.: Revision of the East Palaearctic species of the Leptocera (s. str.) fontinalis-group (Diptera, Sphaeroceridae)

andrial sclerite distinct. Pseudocerci robust including their long ventral projection. Telomere (Fig. 24) very bulky. Fore part of telomere with thick, short anterior ventral projection finely haired and bearing darkly pigmented apical thorn-like corner; posterior lobe of this fore part with 2 robust lobes; the anterior of them with only very short setulae, the other carrying a long bristle. Hind part of telomere also unusually robust (in contrast to all relatives) and armed by a robust spine and 2 anterior setae and by a row of long setae posteriorly. Aedeagal complex (Fig. 25) similar to those of L. finalis or L. parafinalis but slightly differing in shape of distiphallus and postgonite. Ejaculatory apodeme relatively large. 9 unknown. Distribution — Known only from unique holotype male frcm Mongolia (Chentej aimak) (L. Papp 1973). Discussion — L. spinitarsata undoubtedly belongs to L./7/w//s-subgroup (cf. the formation of the aedeagal complex and telomere). It can be best recognized by ils strongly upcurved R^ + 5

, long and stout ventral bristle on mid basitarsus and distinctive male genitalia (robust pseudocerci, telomere bulky and characteristically formed). Leptocera (Leptocera) dyscola sp. n. çf $ (Figs 28-37, 42) Type material — Holotype J: USSR, Amurskaya obi., g. Zeya, 25 VIII 1981, A. SHATALKIN leg. — Allotype $ with same data but collected 25 VII 1981 ; paratypes: 1 o", 1 9 : same locality, 15 VIII and 28 VIII 1981 respectively, both A. SHATALKIN leg.; 1 d": same locality, 5 VII 1981, A. OZEROV leg. — Holotype, allotype and 1 9 paratype in MGU, 1 d

1 paratype in HNHM and 1 d* paratype in SMO. Description — <i. Total body length 2.18-2.38 mm; general colour brownish black,, subshiny. — Head almost black, dull. Frons anteriorly brown, posteriorly black. Frontal and ocellar triangle, orbits and interfrontalia silvery grey pollinose and glittering. Cephalic bristles robust but postverticals rather small though with apices crossing. 3 interfrontals becoming longer anteriorad and 1 very minute seta in front of them; 1-2 microsetae laterad to the latter small interfrontal also present. 4-5 small additional setulae inside and below orbitals ; 2 uppermost somewhat stronger. Frontal lunule pale greyish pollinose; facial cavity black and rather shining despite some brown pollination; gena black but densely greyish dusted and dull. Genal bristle of medium length. Eye normal, its diameter about 3.1 times as long as the smallest genal width. Antennae black with brown 3rd segment. Arista rather long haired (but shorter than that of L. caenosa) and about 4.4-4.6 times as long as antenna. Thorax brownish black, grey to greyish brown pollinose. Mesonotum somewhat shining, scutellum and pleurae more heavily dusted and dull. 2 humerais (the external very long) and 1 microseta on humeral callus. 5(2 +3) dorsocentrals becoming shorter anteriorad, the most posterior longer than scutellum. 2-3 (1+1 or 2 + 1) pairs of medial acrostichals only slightly enlarged and 1-2 rows of acrostichal microsetae running between them. 8-10 rows of acrostichal microsetae between dorsocentrals on suture. Scutellum large and long, rounded triangular, with 2 very long and 2 short bristles as usual. 2 sternopleurals, the anterior small, the posterior very long. — Legs blackish, only trochanters, knees and tarsi brown to yellowish brown. Chaetotaxy of mid tibia (Figs 35, 36) with a small dorsal seta above the distal robust bristle, 3 anteroapical bristles subequal in length and 2 slightly longer posteroapical ones; mid basitarsus with robust ventral bristle. Ratio t

2

: mt., = 1.84-1.97. — Wing (Fig. 42) with unusually pale greyish (not brownish) membrane and pale brown veins. C not extended beyond ^?

4+5

. First costal sector long and sparsely setulose. R

2+3 rather straight, apically slightly bent up to C. R

i+5 also comparatively slightly curved up to C. Discal cell medium-sized, distally tapered, with very short pigmented

!

process of M

l+2 and usually longer one of M

3+i beyond r

p

. Alula large, broad, apically tapered. Wing measurements: length 2.14-2.30 mm, width 0.91-0.98 mm, C-index = 1.51-1.79, /

a-r

p : t

p = 2.86-3.33. Haltères yellow to dirty orange. Abdomen blackish brown, greyish brown pollinose, subshiny. Terga and sterna rather densely setulose. Syntergum 1 +2 with large pale pigmented mediobasal area. 3rd-5th tergum with long bristles in posterior corners besides short setae on disc. Sterna becoming wider posteriorad and densely setulose. 5th sternum (Fig. 31) rather densely and shortly setulose but with a very long (longer than length of 5th sternum) bristle in posterior corners. Membraneous, finely spinulose posteromedial area largest among relatives, almost as large as that of L. oldenbergi. Genitalia •— Periandrium (Figs 28,29) rather densely and long setose compared to that of allied species, with a long caudal bristle; also some bristles adjacent to it relatively long. Hypandrium robust, Y-shaped. Intraperiandrial sclerite large, subanal plate not developed. Pseudocerci