ART. 3. DKOSOPHILID TWO-WIISTGED FLIES MALLOCH. 9 



with segments 1 to 4 compressed, first nearly as high as long, second 

 about twice as high as long, third and fourth each with a long dorsal 

 extension which is blunt at apex, of uniform width and about four 

 times as high as length of segment. Inner cross-vein at middle of 

 discal cell; second vein bent towards costa at it's middle, joining costa 

 almost at a right angle. 



Length, 2.5 mm. 



Type, Alhajuelo, Panama, March 12, 1912 (A. Busck) . 



In my key to the species of this genus already referred to this 

 species will run to caption 3. From both species therein included 

 it will be readily distinguished by the remarkably compressed fore 

 tarsi as well as their color, and from tarsalis by the yellow palpi. 



Type.— Cdit. No. 26997, U.S.N.M. 



STEGANA NIGRIMANA, new species. 



Male. — Frons more suffused with brown than in the last species, 

 lower margin of face brown or fuscous, dorsum of thorax fuscous 

 brown, abdomen largely fuscous, fore tarsi black except the base of 

 first segment, apices of fore femora, almost all of mid and hind 

 femora, and the greater part of mid tibiae brown; halteres brown; 

 wings more uniformly brown than in last species. 



Structurally similar to last species, but the fore tarsi are less con- 

 spicuously compressed, segments 2 to 4 being equally high, and about 

 twice as high as long. 



Length, 2 mm. 



Type and one male paratype, Alhajuelo, Panama, March 12, 1912 

 (A. Busck). 



This species will run to the same caption as last in my key already 

 referred to but may be distinguished from tarsalis by the yellow 

 j)alpi, and from the other species by the differently colored fore tarsi. 



Type.—C2it. No. 26998, U.S.N.M. 



LEUCOPHENGA BRAZILENSIS, new species. 



Male. — Head rufous, occiput dark brown, palpi infuscated. 

 Thorax brownish yellow, pleura paler. Abdomen marked as in 

 varia Walker, but the black spots are more transverse and those on 

 second and third visible tergites are connected along the hind 

 margins ; the maculation is obviously 2, 5, 5, 5, 2, though in type only 

 the second tergite has outer spot on each side separated from the next 

 one. Legs pale yellow. Wings hyaline, with a fuscous cloud from 

 apex of subcostal cell to inner cross-vein and extending basally as 

 far as furcation of second and third veins, a similar cloud from be- 

 fore middle of second section of costa to tip of wing and suffusing 

 disk of wing between third vein and costa, and a conspicuous 

 clouding over outer cross- vein. 



