io6 ENTOMOLOGICAL NEWS. [March, '09 



Rediscovery of the Bibionid Genus Eupeitenus 



BY D. W. COQUILLETT. 



In 1834, Macquart describes Penthctria atra new species 

 from a specimen in Servilles collection, taken at Philadelphia, 

 and, in 1838, he erected for it a new genus, Eupeitenus, giving 

 a short description and a crude figure. Walker, in 1848, re- 

 ferred two specimens to this species, the one from St. Mar- 

 tin's Falls, British America, the other from Nova Scotia, but 

 threw no light on the characters of either genus or species, and 

 it is not certain that his identification was correct. The species 

 does not appear to have been recognized since, and heretofore 

 has been referred to as a synonym of Biblio heteroptera Say, a 

 member of the genus Plecia. 



Wing of Eupeitenus. 



Among a small collection of Diptera made by Mr. H. S. 

 Harbeck, of Philadelphia, is a specimen agreeing in the main 

 with Macquart's description and figure of the species men- 

 tioned above. This specimen is a female, while Macquart's 

 was a male, and this difference, taken in connection with Mac- 

 quart's well-known inaccuracy, renders the identification very 

 probable. The specimen was captured at Germantown, a sub- 

 urb of Philadelphia, on April 26, 1908. The head and its mem- 

 bers, as also the body and legs, are essentially those of a 

 Plecia; the first joint of the hind tarsi is not swollen, as the 

 figure indicates, but this may be a secondary sexual character. 

 The second submarginal cell is much longer than the first pos- 

 terior, the first basal is decidedly longer than the second basal, 

 and the fourth vein forks a short distance beyond the small 

 cross-vein (see Fig. --). In all other respects this specimen 

 agrees fairly well with Macquart's figure, and, as it came from 

 the same locality as the type, there can be little doubt as to its 

 identity. 



The genus Eupeitenus is a valid one, readily distinguishable 

 from our other Bibionid genera by the presence of two sub- 

 marginal cells in each wing. 



