Vol. XXV] ENTOMOLOGICAL NEWS 31 



A new Borborid (Diptera) from Panama. 



By J. R. MALLOCH, Urbana, Illinois. 



Sphaerocera pallipes, new species. 



Female. Black, slightly shining. Antennae yellow, basal joint dark- 

 est; proboscis yellow. Thorax black, pleurae shining. Abdomen black 

 on dorsum, yellow beneath. Legs entirely pale yellow. Wings clear, 

 veins yellow. Halteres yellow. 



Frons opaque, slightly granulose on surface, rather more than one- 

 half as wide as head, no bristles present, the surface hairs pale and 

 very short ; antenna? small, inserted in cavities on either side of the 

 upper part- of the face, which is flattened, triangular in shape and pro- 

 jects distinctly beyond the anterior margin of f rons ; the antennas thus 

 lie at right angles to the long axis of the body ; arista hair-like, bare, 

 and about twice as long as width of f rons ; mouth opening large ; 

 labrum flattened, distinctly protruding; cheek as high as the rather 

 small eye ; in profile the head is flattened in front and almost upright ; 

 the eye occupies slightly more than one-half the distance from vertex 

 to anterior margin of head. Thorax in poor condition, but mesonotum 

 with evident traces of four longitudinal rows of short, pale hairs on 

 disk ; scutellum rounded in outline, the posterior margin with faint 

 traces of tubercules, one at either side, widely separated, being most 

 distinct. Abdomen elongate oval ; segments bare above. Legs long, 

 and strong; their surfaces with very short, pale hairs, but no bristles 

 present ; hind tibia without an apical spur ; hind metatarsus swollen, 

 the upper surface slightly rounded ; ventral surface flattened, the usual 

 brush of hairs of the other species in the genus is represented only by a 

 few hairs which are most distinct at apex ; length of metatarsus about 

 one and one-fourth that of the second joint which is not swollen; claws 

 long, black at apices. Wings with veins 3 and 4 distinctly convergent 

 at apices. 



Length, 1.5 mm. 



Type: Cat. No. 15974, U. S. N. M. 



Locality: Buena Ventura, Panama, May 19, 1911, (A. 

 Busck). 



Distinguished from S. subsultans Fabricius by the absence 

 of the spur on hind tibia, from S. bimaculata Williston by the 

 unicolorous abdomen, from S. pusilla Fallen by the course of 

 the third and fourth veins, and from 5". annulicornis Malloch 

 by the entirely pale legs. 



