220 NEW YORK STATE MUSEUM 



Members of this genus are easily recognized by their general re- 

 semblance to Lasioptera in connection with the densely scaled, 

 usually fuscous wing membrane. The two are readily separated 

 by the fact that the antennal segments in Brachyneura are much 

 longer than in Lasioptera and, moreover, never possess the char- 

 acteristic circumfili almost, invariably found in the Itonididinae. 

 The antennae are composed of 12 segments. There are 3 simple 

 long veins. The tarsi are quinqearticulate. Type B. fusco- 

 g r i s e a Rond. 



Two American species of this genus have been reared, one B . 

 e u p a t o r i i was bred presumably from an oval swelling on 

 thoroughwort, Eupatorium perfoliatum, the other 

 species, B . v i t i s , was reared from a jar containing the familiar 

 Lasioptera vitis gall on grape, Vitis sp., and presumably 

 came from this plant. 



Key to species 



a Fifth antennal segment with a length twice its diameter; scutellum 

 yellowish 

 b Antennae with 11 segments, femora and tibiae dark brown. Bred ? 



from Lasioptera vitis gall vitis Felt, C. an6sd 



bb Antennae with 12 segments; femora and tibiae silvery grey. Bred 



from thoroughwort, Eupatorium perfoliatum 



e u p a t o r i i Felt, C. a.1349 



aa Fifth antennal segment with a length three times its diameter, scutellum 



black, legs uniform fuscous or black, .a m e r i c a n a Felt, C. 734 



Brachyneura vitis Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 317 

 1909 Ent. Soc. Ont. 39th Rep't, p. 44 



This species was feared July 13, 1907 from a jar containing the 

 familiar Lasioptera vitis galls on grape, Vitis sp., 

 and presumably came from this plant. 



Male. Length .5 mm. Antennae nearly as long as the body, 

 sparsely haired, dark brown ; 1 1 segments, fifth subcylindric, with 

 a stem one-fourth the basal enlargement, which latter has a length 

 about twice its diameter, and is thickly clothed with short, narrow, 

 appressed scales ; terminal segment produced, tapering to a narrowly 

 rounded apex. Palpi; the first segment short, stout, subquadrate, 

 the second and third apparently stout, each with a length about 

 three times its diameter. Mesonotum black. Scutellum, postscutel- 

 lum and basal abdominal segment apparently fuscous yellowish, the 

 remainder of the abdomen dark brown, sparsely haired. Wings 

 hyaline, costa dark brown ; membrane thickly clothed with fine 

 hairs. Halteres yellowish transparent. Legs a variable dark 

 brown ; claws unidentate, pulvilli shorter than the claws. Genitalia ; 



