1918] Dipterous Genus Drapetis Meigen 211 



abdomen brown and with flattened lateral setulae. Legs slender, flexor 

 hairs of the front femora long and yellow, middle tibiae armed within 

 with two rows of minute hook-like black setute, the apex angulate and 

 black, hind tibiae with two extensor bristles located before the basal 

 third and beyond the apical third, the apical lappet sharp and rather 

 strong. Halteres yellow. Wings narrow, more than three times as 

 long as wide, veins yellow, second, third and fourth sections of the 

 costa proportioned 1 : 1.3 : 0.6, third and fourth veins nearly straight 

 and parallel, sections of the fourth vein proportioned 1 : 1 : 2.2, of the 

 fifth vein, 2.5 : 1. 



One specimen: Orizaba, Mexico (H. H. Smith); in author's 

 collection. 



Elaphropeza rectineura, sp. nov. 

 Length L6 mm. Robust, yellow species, with pale hairs and 

 bristles, last tarsal joint blackish. Head black, front narrow, the sides 

 slightly converging below, at the bottom one-third as wide as the second 

 antennal joint, ocellar bristles long, eyes contiguous beneath the 

 antennae; palpi white, proboscis short, yellow; antennae yellow, the 

 second joint without seta, the third joint broadly lanceolate, scarcely 

 twice as long as broad. Thorax loosely hairy, two rows of six acros- 

 tichals, scutellum yellow, with lateral bristle one-fourth as long as the 

 apical pair, metathorax yellow. Abdomen brownish yellow in the 

 middle segments, where laterally there are many minute flattened 

 setulee. Middle femora alone with preapical setulse, hind tibiae with two 

 long extensor bristles trisecting its length, the apical spur short and 

 blunt. Halteres yellow, calypteres with five cilia. Wings clear hyaline, 

 rather broad and rounded, marginal cilia short, the second, third and 

 fourth sections of the costa proportioned 1 : 2 : 1 , the third and fourth 

 veins nearly straight, uniformly but slightly diverging, the first posterior 

 cell widest at its apex, anterior cross-vein before the middle of the 

 second basal cell, the outer two sections of the fourth v^ein proportioned 

 1 :2.7, of the fifth vein, 2:1. 



Two specimens: Tabogal and Corazal, Panama, collected 

 by August Busck for the U. S. National Museum. 



Elaphropeza seminigra, sp. nov. 

 (^ . Length 2.5 mm. Partly testaceous yellow and partly black. 

 Occiput black, the upper orbits largely shining, the remainder pollinose, 

 ocellar bristles brown, reaching to the antenna, vertical bristles long 

 and black; front very narrowly triangular; antenna yellow, the third 

 joint but slightly longer than deep, its blackish arista three times the 

 length of the antenna proper, closely and evidently pubescent; palpi 

 yellow, proboscis tipped with black. Thorax shining, the mesonotum 

 broadly yellow about the shoulders, medially black, the dark coloring 

 extending from side to side at the wings, bristles and hairs long and 

 yellow, four rows of scattered acrostichals ; scutellum and metanotum 

 black, the apical pair of scutellar bristles approximate, long and cruciate; 



