Vol. XXXl] ENTOMOLOGICAL NEWS 75 



Halteres dark brown, the extreme base of the stem pale. Legs with the 

 coxae testaceous; trochanters pale brown; remainder of the legs pale 

 brown; no tibial spurs. 



Wings with 'a strong grey suffusion; veins brown. Venation; almost 

 as in P. conjuncla but #2+3 a little longer; Ri before r a little longer; basal 

 deflection of Cni some distance beyond the fork of M and cell M* much 

 deeper, vein M 3 alone being longer than the fused portion of M 3 and CHI. 



Abdomen dark brown, the stermtes a little paler. Ovipositor with' the 

 valves horn-colored, long, straight, the tips acute. 



Holotype: 9 . Itacontiara, October 16, 1919 (H. S. Parish). 



The lack, or apparent lack, of tibial spurs would refer this 

 fly to the genus Erioptera rather than Polymera, yet the ap- 

 pearance of the insect is so very similar to species of this latter 

 genus that it is referred here, at least provisionally. Whether 

 the tibial spurs are similarly lacking in P. conjuncta Alexander 

 cannot be determined at this time as no specimens are at hand. 



Brachypremna uniformis sp. n. 



Close to B. dispellens; femora and tibiae uniformly dark brown, the 

 tarsi fading into cream-colqr. 



9. Length 15 mm.; wing 14.2 mm. Generally similar to B. dispellens. 

 (Walker), differing as follows: Palpi with the first segment dark brown, 

 the apex narrowly pale; segment two entirely pale yellow; segment three 

 black basally, about the outer third obscure yellow; last segment black 

 with the extreme tip conspicuous yellow. Mesonotal praescutum with the 

 intermediate pair of brown stripes broader. Legs with the femora and 

 tibiae of all the legs uniform brown; tarsi pale brown, the distal segments 

 passing into cream color. Abdominal sternites one to eight with an elon- 

 gate-oval black dash near the center of each segment. 



Holotype: 9, Parintins, October 8, 1919 (H. S. Parish). 



Brachypremna uniformis differs conspicuously from all the 

 known species of the genus with the exception of B. unicolor 

 Osten Sacken (Antilles) in the uniformly dark femora and 

 tibiae. By means of the author's key to the species of this 

 genus (Journ. N. Y. Ent. Soc., vol. 20, p. 228; 1912), B. inii 

 formis would not run past the initial couplet because of the 

 combination of venation and leg-coloration. The venation 

 is quite as in B. dispellens and related species but the entire 

 absence of white on the femora and tibiae precludes its re- 

 ference to any of these species. B. unicolor differs from all 

 other species of the genus as known, including this new form,, 

 in the very curious wing- venation. 



