206 NEW YORK STATE MUSEUM 



light brown, the terminal segments darker ; claws long, slender, 

 strongly curved. Genitalia; basal and terminal clasp segments, 

 stout ; dorsal plate broad, deeply and triangularly emarginate ; ven- 

 tral plate broad, long, slightly emarginate. Type Cecid. 519. 



Rhizomyia vitis Felt 



1907 Felt, E. P. New Species Cecidomyiidae II, p. 9-10 (Ariioldia) 



1908 X. Y. State Mus. Bui. 124. p. 290-91, 341 (Arnoldia) 



This species was reared at Albany, N. Y., July 13, 1907 from 

 a jar containing the familiar tumid gall of Lasioptera vitis 

 O. S. on grape, Vitis species. It was also obtained from a jar in 

 which were adherent leaf galls on Solidago inhabited by C a m p - 

 ton euro myia adhesa Felt and A s p h o n d y 1 i a m o n - 

 a c h a O. S. 



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

 thickly haired, fuscous yellowish, yellowish basally; 12 segments, 

 the fifth with a stem as long as the basal enlargement, which latter 

 has a length twice its diameter; terminal segment produced, taper- 

 ing, narrowly rounded. Palpi ; the first segment long, subquadrate, 

 the second stouter, narrowly oval, the third one-half longer than 

 the second, more slender. Alesonotum and dorsum of abdomen 

 yellowish brown. Scutellum, postscutellum, parities and incisures 

 pale yellowish. Wings hyaline, costa dark brown. Halteres yel- 

 lowish basally, fuscous apically. Legs yellowish basally, dark brown 

 distally ; claws long, slender, strongly curved, the pulvilli shorter 

 than the claws. Genitalia ; basal and terminal clasp segments stout ; 

 dorsal plate long, narrow, broadly and roundly emarginate ; ventral 

 plate short, stout, narrowly rounded. 



Female. Length 1.5 mm. Antennae extending to the third ab- 

 dominal segment, rather thickly haired, dark brown, yellowish 

 basally; 12 segments, the fifth subsessile, cylindric, with a length 

 two and one-half times its diameter; terminal segment produced, 

 narrowly rounded. Mesonotum dark brown, the submedian lines 

 yellowish. Scutellum and postscutellum yellowish. Abdomen light 

 fuscous yellowish, the incisures, pleurae and venter pale yellow- 

 ish. Ovipositor short, the terminal lobes broadly oval, otherwise 

 nearly as in the male. Type Cecid. aii65a. 



Rhizomyia absobrina Felt 



1907 Felt, E. P. New Species Cecidomyiidae II, p. 8 (Arnoldia) 



1908 N. Y. State Mus. Bui. 124, p. 289, 340 (Arnoldia) 



This species was reared at Albany, N. Y., July nth and 26th, 

 1906 from a jar containing Crataegus leaves bearing green, sub- 



