492 



UNITED STATES NATIONAL MUSEUM BULLETIN 2 24 



the second tergite, becoming rapidly shorted on the re- 

 mainder. Sides and postmargins of the tergites without 

 special modified pile. Sternites with long, fine, bushy 

 pile. Only seven tergites visible in the male. Male 

 terminalia quite large, massive, conspicuous. They are 

 wide but short and the superior forceps thick, very con- 

 vex laterally, arched outwardly with a sharp, rounded 

 bend which bends back toward the medial plane. In 

 the wide cavity above, the proctiger lies low. The gono- 

 pod is almost as stout as the upper forceps, but only 

 half as long. Hypandrium well developed. Female 

 with seven tergites exclusive of the ovipositor; the 

 eighth tergite is short, extremely wide ventrally; it 

 forms approximately an equilateral triangle which is 

 wide and rounded or convex doreally. The ninth ter- 

 gite is as long or slightly longer than the eighth, rather 

 flattened across the top but compressed laterally. The 

 tenth is a little shorter than the ninth, wide and obtuse, 

 with a medial fissure dorsally and the ventral margins 

 bearing numerous stout bristles, their length nearly as 

 great as the height of the tenth tergite. Ventral mar- 

 gin of the ninth tergite with similar fringe of bristles, 

 the basal ones a little longer. Dorsal surface of the 

 tenth tergite is thickly beset with short stubby bristles. 

 Distribution: Palaearctic: Polysarca gussakovsMi 

 Paramonov (1937) ; ungulata Pallas (1818) \^=neptis 

 Loew (1873)]; violacea Schiner (1866). 



Genus Polysarcodes Paramonov 



Polysarcodes Paramonov, Trav. Mus. Zool. Kiev, vol. 18, no. 20, 

 p. 74, 1937. Type of genus : Polysarcodes moestus Para- 

 monov, 1937, by original designation. 



The following is Paramonov's description in trans- 

 lation : 



In its habitus very similar to Polysarca. Venation as veith 

 Polysarca, except however, the veins that run to the hind 

 border of the wing are entirely normally developed. The sec- 

 tion of vein between r-m and the fork of the third vein is only 

 1.5 times smaller than in the anterior and posterior branches 

 of the third vein (with Polysarca or Satanas it is two times). 

 Metatarsus of all legs at least equal the sum of the 3 following 

 segments of the tarsus. Proboscis almost as long as the di- 

 ameter of the eye and very thick. The face in profile is almost 

 straight on the upper half, on the lower half clearly protruding 

 towards the front, however, it does not form any hump or 

 gibbosity. The third antennal segment is long and cylindrical, 

 taken without the style, it is two times as long as both basal 

 segments ; style made of of two segments. The first antennal 

 segments almost equal. Lateral swelling of the mesonotum 

 with a tuft of hair on the pteropleuron. Before the halteres 

 are found quite numerous bristles ; sides of thorax almost bare. 

 On the underside of the hind femur there are 10-12 bristles 

 (at least 6), but with Polysarca or Satanas only four. 



Genitalia very similar to Polysarca neptis yet longer. The 

 abdomen of the female is elongate, the last segments form a 

 long ovipositor, which is covered with erect or semierect, short 

 bristles. Body black pilose. 



Distribution: Palaearctic: Polysarcodes moestus 

 Paramonov (1937). 



Genus Apotinocerus Hull 



FiGTJEES 395, 738, 1367, 1376, 2181, 2457, 2458, 2459, 2460 



Apotinocerus Hull, Bull. Brooklyn Ent. Soc, vol. .^)1, p. 69, 1956. 

 Type of genus : Proctacanthus Ijrevistylatus Wulp, 1882, by 

 original designation. 



Rather small flies, the abdomen tapered in females, 

 cylindroid in males, with rather long, stiff, flat ap- 

 pressed pile on legs and abdomen. The mesonotal pile 

 is fine, sharp and setate. They are characterized by the 

 long, slender, third antennal segment with the antennal 

 style exceptionally short, stout and only as long as the 

 second anteimal segment. Not closely related to other 

 genera, although the antenna resembles Gla'phyro'pyga 

 Schiner. Length 17 mm. 



Head, lateral aspect : The face is scarcely visible on 

 the upper fourth, but prominent and protuberant below 

 on the remainder. The pile of the occiput is stiff, scanty 

 above, becoming dense and tufted and bushy on the 

 lower third of the occiput. Bristles begin at the lower 

 third and consist of approximately 22 pairs of stout, 

 moderately long bristles. The proboscis is short and 

 rather slender. The palpus is of one segment, with a 

 few, long, coarse, opaque hairs. The antenna is slender, 

 rather elongate, the first segment is at least twice as 

 long as the second; the third segment is unusually 

 long and slender and excluding style, is as long as the 

 first 2 segments together. This segment is a little tliick- 

 ened at the base, at most only slightly attenuate near the 

 apex, and bears a short, stout style which is a third as 

 long as the third segment; the style is slightly flattened, 

 witli a minute spine at apex. The first segment bears 10 

 to 12 coarse, appressed bristles. 



Head, anterior aspect : The head is nearly circular in 

 outline. The face below the antenna is a fourth the 

 head width and divergent below. Face pubescent, with- 

 out pile but with numerous, moderately stiff bristles 

 confmed to the middle of the facial protuberance and 

 curved obliquely downward; at the epistomal margin 

 there are 4 pairs of extremely stout, longer bristles di- 

 rected downward, together with an additional 2 pairs of 

 weaker bristles on the sides of the subepistoma. The 

 front is scarcely wider than face, the vertex slightly 

 convergent. Sides of front with some 15 rather stout 

 bristles ; vertex deeply excavated, ocellar protuberance 

 low, with 3 or 4 pairs of short, divergent bristles. 



Thorax : The thorax is poUinose, including the pleu- 

 ron. The pile of the mesonotum is abundant, suberect, 

 basally stout and composed of distally sharp setae, ex- 

 tending everywhere over the lateral mesonotum as far 

 as the postalar region. Acrostical setae are present; 

 the dorsocentral elements posteriorly become long and 

 slender, with the last 2 pairs quite stout. Humerus 

 setate, with 5 or 6 weak, short bristles. Remaining 

 bristles of mesonotum quite long and very stout ; noto- 

 pleuron with 2, the postsupraalar with 1, the postalar 

 with 2 bristles. Scutellar margin with a wide band of 

 rather long, slender bristles. Wliole scutellum thick 

 and convex, without distinct margin. Posterior half of 



