ART. 10 TROPICAL AMERICAN DIPTERA VAN DUZEE 19 



hind tarsi black; first joint of hind tarsi with an erect bristle below 

 near the base, which is half as long as the joint and slightly curved ; 

 joints of fore tarsi as 41-23-18-10-8; those of middle ones as 

 42-23-15-8-7; joints of posterior pair as 33-25-13-7-5, their spine 

 as 17. Calypters and halteres yellow, cilia of the former black. 

 Pulvilli of fore tarsi scarcely enlarged. 



Wings grayish, slightly brownish in front of third vein; first vein 

 reaching one third of the distance to tip of second vein; third vein 

 running quite close to second vein to near the tip of that vein then 

 quite abruptly bending backward; last section of fourth vein nearly 

 straight, only a little arched forward in the middle, therefore not 

 parallel with third vein; cross vein 22, last section of fifth vein 

 twenty-nine fiftieths of a millimeter long. 



Described from one male, taken by Nathan Banks, July 3, 1924, at 

 Fort Sherman, Panama Canal Zone. 



Type. — In the Museum of Comparative Zoology- 



This is nearly like sim2:)lex Aldrich, but the third and fourth veins 

 are much nearer parallel, the third vein not being greatly bent as in 

 that species and the bristles at tip of abdomen are also very small. 



DIAPHORUS VARIPES, new species 



Male — Length 3.5 mm. Face wide, silvery white, a little longer 

 than wide ; eyes contiguous above the antennae. Proboscis and palpi 

 black. Antennae wholly black, third joint flattened or a little con- 

 cave at tip, arista apical ; lower orbital cilia white. 



Thorax and scutellum bright green with white pollen; bristles of 

 thorax strong and black. Abdomen more bronze color or coppery, 

 its hairs black, those on the venter long and white; hypopygium 

 and its appendages small; bristles at tip of abdomen strong. 



Fore coxae j-ellow, blackened on outer surface almost to tip, its hairs 

 few and pale, bristles at tip black; middle and hind coxae black; 

 fore femora wholly yellow with long pale hairs below; middle 

 femora yellow at base and on most of apical half, black in tlie mid- 

 dle; hind femora yellow with upper surface of apical half 

 black, except at extreme tip; all tibiae and more or less of 

 first tarsal joint yellow, tarsi blackish beyond the tip of first joint; 

 middle tibiae with one large bristle near the base on upper anterior 

 edge; pulvilli of fore and middle tarsi longer than their fifth joint, 

 those of posterior tarsi a little shorter ; joints of fore tarsi as 45-16- 

 14-10-5; those of middle pair as 52-24-17-8-6; joints of posterior 

 pair as 34-30-29-10-8. Calypters, their cilia and the halteres yellow. 



Wings grayish; third and fourth veins parallel, fourth ending in 

 the apex of the wing; first vein reaching one-third the distance to tip 



