388 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



Distribution: Oriental (Papuan subregion) : Epa- 

 phroditus placens Walker (1865) [ = conspicua Wulp 

 (1872)] 



Genus Hybozelodes Hermann 



Figuees 217, 653 



Hybozelodes Hermann, Nova Acta Acad. Caes. Leop.-Carol., vol. 

 96, p. 197, 1912. Type of genus: Hybozelodes nlgellus 

 Hermann, 1912, by original designation. 



Small, slender, dark flies of the general appearance of 

 Atomosia Macquart or Atractia Macquart. The an- 

 tenna in Hybozelodes ends in a short, plumose micro- 

 segment, instead of a long style as in Atractia or bluntly 

 as in Atomosia. The end vein of the fourth posterior 

 crossvein is offset from the posterior crossvein by half 

 the length of this crossvein and the lower end rem of 

 the fourth posterior cell forms an acute angle. Length 

 G to 8 mm. 



Head, lateral aspect : The head is of moderate length 

 and strongly convex anteriorly. The face is scarcely 

 visible in profile, except below as a very low protuber- 

 ance which is gradually elevated. Occiput with a row 

 of 6 short, quite stout, black bristles placed deeply sub- 

 marginally on the upper half of the head. The pro- 

 boscis is extremely short, cylindrical, basally thickened 

 and bears a dorsal crease. The apex is subtruncate and 

 pilose, the base with a few long hairs. Palpus minute, 

 cylindrical, short ; at the apex are 3 or 4 relatively short, 

 stiff bristles. Antenna elongate; the first segment is 

 twice as long as the beadlike second and bears 1 excep- 

 tionally long, conspicuous bristle. Third segment 

 widest near the base and gradually and strongly attenu- 

 ate beyond the dorsal surface ; at the middle it is plane 

 with an incision and spine; the apex of this segment 

 bears a small, short yet distinct, subplumose micro- 

 segment. 



Head, anterior aspect : The face below the antenna is 

 narrow and slightly divergent below. On each side of 

 the face is a vertical row of scattered, black bristles of 

 varying lengths ; the upper 2 are of medium length, the 

 submedial pair below it is slightly shorter, the next pair 

 is located near the middle of the face and is rather long 

 and stouter, followed by 2 other still lower pairs which 

 are equally stout and long. The lowest part of the face 

 has laterally 3 bristles of decreasing length, with the 

 uppermost longest ; as a result there are on each side of 

 the face submedially 7 rather long, divergent bristles 

 besides, still more lateral in position, about 7 other 

 shorter, weaker, more slender hairs. Sides of the front 

 with 2 or 3 slender bristles. Vertex excavated. Ocel- 

 lar protuberance moderately high with vertical sides. 

 Above the front ocellus there is a pair of long, stout, 

 black, divergent bristles curving backward. Anterior 

 facets moderately enlarged in the middle. 



Thorax : The mesonotum is polished and shining, the 

 pile abundant, long, subappressed and black. The lat- 

 eral bristles consist of 1 notopleural, 1 supraalar, 1 post- 

 alar, and 1 pair of quite long, stout bristles on the 

 scutellum besides 2 pail's of short, weak bristles. Meso- 



pleuron with 1, hypopleuron with long and short pu- 

 bescence and 2 or 3 long, slender hairs; metapleuron 

 with a fan of 6 long, slender, downwardly curved bris- 

 tles. Metanotal slopes bulging and set with long, 

 abundant pile and 2 or 3 weak bristles. Lateral meta- 

 sternum pilose. Postmetacoxal area short, not as long 

 as wide, but strongly chitinized. 



Legs: The hind femur is rather slender and all the 

 femora are polished black. The hind femur has a dorsal 

 row of 6 bristles, the bristle at the outer fourth is longer 

 and stronger; in addition there are a few shorter, ap- 

 pressed hairs. Lateral surface with 1 long, quite strong 

 bristle just beyond the middle and with a ventrolateral 

 row of 5 or 6 slender, bristly hairs, besides 1 quite long, 

 slender, ventral bristle, a medial row of 7 long, slender, 

 ventral bristles and a medial row of long, slender, deli- 

 cate hairs. In addition, ventrally there is a rather 

 abundant band of moderately long, fine pile consisting 

 of some 50 hairs. The hind tibia is slightly and gradu- 

 ally thickened towards apex ; it bears long, fine, erect, 

 ventral pile forming a band which changes to short, 

 appressed, somewhat flattened, matted pile at the ex- 

 treme apex. The ventral margin has 4 moderately long, 

 ventral, black bristles, erect but curved distally ; dorsal 

 surface with 1 rather short, basal and 1 still shorter 

 submedial bristle, 1 long, stout, medial and 1 equally 

 long, stout bristle placed at the outer sixth. In addi- 

 tion there are 3 very stout, long, somewhat oblique, 

 curved, lateral, black bristles. Apex laterally with 2 

 long, stout bristles; medial bristles weak. Middle fe- 

 mur with 1 long, anterodorsal bristle at the outer third, 

 1 equally long, pale, anterior bristle below it. Dorsal 

 and ventral surfaces of middle tibia with extremely 

 long, stout, reddish yellow bristles, somewhat oblique 

 and somewhat anterior in position; there are 3 above 

 and 3 below and 4 or 5 weaker, much shorter, anterior 

 bristles. 



Anterior femur with a posterodorsal row of 4 bristles 

 all of which, except the basal one, are long and stout. 

 Anterior tibia with 3 extremely long, slender, pale 

 bristles posteroventrally ; 4 dorsal bristles, the outer ele- 

 ment much longer, the basal elements short and weak ; 

 in addition 1 still longer, subapical anterodorsal bristle. 

 Apex with 3 bristles. Claws sharp, rather short; pul- 

 villi four-fifths as long as claws; empodium slender, 

 two-thirds as long as claw, somewhat thickened at the 

 base. 



Wings : The marginal cell is closed with a long stalk. 

 Fourth posterior cell closed with a short stalk. Vein 

 closing fourth posterior cell offset from end of discal 

 cell by more than half the width of the discal cell ; end 

 of second basal cell with 3 veins. The ambient vein 

 ends at the end of the second posterior cell. 



Abdomen: The abdomen is slender and subcylin- 

 drical, slightly but distinctly wider distally; it begins 

 to widen at the end of the second tergite ; the abdomen 

 is polished and shining black and not punctulate. 

 Sides of the second tergite with vertical row of 5 

 long, weak, radiating, pale, bristly hairs. Remaining 





