March. .911.] Felt: Generic Synopsis of Itonid^. 43 



that the fifth vein has been described as simple. Clinorhyncha H. Lw. 

 is probably a synonym. Europe. 

 Genus CAMPTONEUROMYIA Felt 1908, type Dasyneura virginica Felt. 

 The third vein widely separated from costa and strongly arched, 

 it and the body not very thickly clothed with scales; antennal seg- 

 ments sessile in both sexes. North America. 



Genus TROTTERIA Kieff. 1892, type Lasioptera obtusa H. Lw. 

 Third vein widely separated from costa, it and the body thickly 

 clothed with shining scales; easily distinguished from other members 

 of the tribe by the produced first antennal segment, the latter with a 

 length about three times its diameter. Synonym : Choristoneura Riibs. 

 1892. preoccupied. Europe, North America. 



Tribe DASYNEURIARIM. 

 A large group, the members being easily separated from the pre- 

 ceding tribe by the almost uniform absence of scales on costa and 

 the third vein always well separated therefrom. The antennse are 

 cylindric, never binodose in the male, while the claws are invariably 

 toothed; antennal segments from 12 to over 20; palpi uni- to quadri- 

 articulate. Many of the species produce stem or bud galls. 

 Genus RHABDOPHAGA Westw. 1847, type Cecidomyia viminalis Westw. 



Usually large forms with 14 or more antennal segments, the 

 flagellate ones of the male stemmed. Separated from the following 

 genus by the third vein being straight, usually tapering distally and 

 uniting with costa very near or at the wing apex. Synonyms: 

 Dichelomyia Rubs. 1892, in part; Bcrtieria Kieff. 1896, in part. Eu- 

 rope, North America. 



Genus DASYNEURA Rond. 1846, type D. luteofnsca Rond. 

 Distinguished from the preceding by the third vein being straight 

 or curved anteriorly, tapering but little distally and uniting with costa 

 distinctly before the apex of the wing. The wings are hyaline, the 

 membrane not scaled, the female ovipositor long, sometimes longer 

 than the body and the circumfili not greatly produced. Synonyms: 

 Perrisia Rond. 1846; Dichelomyia Riibs. 1892, in part; Bertieria 

 Kieff. 1896, in part, and Neocerata Coq. 1900. Europe, North America, 

 Australia. 



