104 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



This species is easily mistaken for 0. graminis, but is quite 

 distinct from it when slide preparations are compared. Among 

 the more conspicuous differences are: the greater width of base of 

 pygidium in our species; the dorsal pores and intersegmental 

 sutures on the abdomen are much more distinct. Also, the median 

 lobes of ruthce, as indicated, are more separated, and the species is 

 perceptibly smaller and more hyaline than graminis. Moreover, 

 our species bears paragenital glands which do not occur in the 

 other. 



A specimen (slide) in the Bureau collection from New Or- 

 leans, La., on Bermuda grass (T. C. Barber) is in its pygidial 

 characters absolutely identical with ruthw, except that the entire 

 body is considerably longer, being oval in outline (0.93 x 0.64 

 mm.). Paragenital pores in lateral groups more numerous. 

 They may be specimens of this species grown under more favor- 

 able conditions. 



The drawings were kindly made for me under my criticism 

 by Miss E. Hart from Mr. Sasscer's photograph and slide. 



A NEW AND INTERESTING GENUS OF NORTH AMERICAN 



TACHINIDyE. 



BY W. R. WALTON, 

 Bureau of Entomology, Cereal and Forage Insect Investigations. 



Our knowledge of the muscoid parasites of grasshoppers in 

 North America is gradually being enlarged. Some of the genera 

 now known to have this habit are as follows : : Sarcophaga, Ocyp- 

 tera, Hilarella, Trichopoda, Heteropterina, Acemyia, and I now add 

 another, constituting a new and unique genus and species. The 

 former I take great pleasure in proposing in honor of the late D. 

 W. Coquillett whose valuable preliminary work in the super- 

 family Muscoidea is recognized by nearly all students. 



Goquillettina, new genus. 



Related to Acemyia Desv. Palpi small and slender, first vein bare, sides 

 of face on lower half bare, proboscis shorter than height of head, eyes 

 bare, lower front corner of third antennal joint bearing a projection, in 

 the male pointing forward (fig. 1-a) in the female, downward and for- 

 ward Cfig. 3b) the lower edge distinctly notched. Eyes bare, front in 



1 I view with grave doubt the authenticity of the recorded rearing of 

 Frontina frvnchii, Will, from Dissosteira Carolina, by Prof. Lugger in 1874 

 as published by Mr. Coquillett. 



