18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



tibiae slender, only very slightly bowed. Spurs and tarsi missing. 

 Middle and hind femora slightly arcuate, surface with punctures 

 separated by about three diameters of the fine punctures near base 

 and posterior margin, gradually larger along anterior margin and 

 outward to apex, where they are coarse and slightly closer together, 

 usually showing extremely short setae except for two or three longer 

 setae at knee. Middle femur with complete posterior marginal line; 

 hind femur with line inward from knee less than half femoral length. 



Diagnosis: Differs from other species of Euparixia in the pronotal 

 outline, simply convex elytral intervals, and by the peculiar pear- 

 shaped depression of the mesosternum. 



Specimens examined: Unique holotype. Only data: Costa Rica 

 (USNM). 



Host: Unknown, but probably Atta colombica Guer. or A. cephalotes 

 (L.). 



