1918] Dipterous Genus Drapetis Meigen 213 



the ocellar bristles long; eyes nearly touching below the antennee; 

 palpi broad, white, with a couple of white bristles, proboscis yellow; 

 antennae short, yellow, the last joint short-lanceolate, one and one-half 

 times as long as wide, the arista three times the antennal length, micro- 

 scopically pubescent. Hairs of middle abdominal segment strong, but not 

 scale-Hke in the Trinidad specimen; hypopygium small. Legs including 

 the coxae pale yellow, slender, the front trochanters with a black dot, 

 apex of hind tibi^ blackish in the Trinidad specimen, middle femora 

 alone with preapical bristle, hind tibiae with two extensor bristles, the 

 outer one small, the apical spur long and thumb-like. Halteres whitish; 

 calypteres with four pale cilia. Wings clear hyaline, veins pale, the 

 third section of the costa one and one-half times either the second or 

 fourth section, the third and fourth veins straight, sHghtly diverging, 

 the last two sections of the fourth vein proportioned 1 : 4, of the fifth 

 vein, 2:1, wing margin ciliate. 



Two specimens. Porto Bello, Panama, March 13, 1911, in 

 the collection of the U. S. National Museum, and Montserrat, 

 Trinidad Island, June 29, both collected by August Busck. 



Elaphropeza uniseta, sp. no v. 



9 . Occiput black, lightly pollinose, a spot on each side of the 

 vertex shining, ocellar and vertical bristles short and black; front very 

 narrow, linear, eyes subcontiguous beneath the antennae; palpi and 

 proboscis yellow, the palpi with scattered blackish hairs; antennae 

 horizontal, brown, the third joint triangular, twice as long as deep, the 

 blackish arista slender, microscopically and closely pubescent, twice as 

 long as the antenns. Thorax shining reddish yellow, mesonotum with a 

 median vitta abbreviated behind, and with a spot above the notopleural 

 suture dark brown, center of the scutellum and the inflated sides of the 

 first abdominal segment also brown; abdomen weakly chitinized except 

 the middle segment whose sides are thickly studded with black scale-like 

 setulffi; hairs of the thorax fine, dark, confined to the anterior region, 

 comprising a few posthumeral and four definite rows of acrostichals 

 with about five hairs to each row; presutural dorsocentral long, scutellum 

 with two long cruciate bristles. Legs including the coxae yellow, a little 

 dusky distally, anterior femora with basal hair below, middle femora 

 with a strong preapical bristle, hind tibiae with a single strong extensor 

 bristle located below the middle and with a broad blunt apical spur. 

 Knob of halteres blackish; calypteres small but with a fan-like fringe 

 of dark cilia. Wings hyaline, veins yellow, first vein ending beyond the 

 middle, third section of the costa about three times either the second or 

 the fourth section, marginal cell at the end of the first vein nearly twice 

 as wide as the submarginal, the latter at the end of the second vein as 

 wide as the first posterior cell, third vein lightly sinuous, converging 

 with the fourth on its outer portion, anterior cross- vein before the 

 middle of the second basal cell, the outer two sections of the fourth 

 vein proportioned 1:2, of the fifth vein, 3:1, costa with a basal hair, 

 but not long ciliate, hairs of the posterior margin of the wings very short. 



One specimen: Manila, Philippine Islands, Robert Brown, 

 collector, in the U. S. National Museum. 



