102 NEW YORK STATE MUSEUM 



claws are almost invariably unidentate and the pul villi generally 

 well developed. 



A large proportion of the species breed in stem galls on woody or 

 herbaceous plants, though the genus Asteromyia exhibits a marked 

 preference for the characteristic and at one time supposedly fungous 

 affected leaf blister galls of aster and Solidago. One Camptoneuro- 

 myia, C. a d h e s a Felt, inhabits the ovate galls between adherent 

 leaves of Solidago canadensis or S. serotina and also 

 occurs in a loose apical bud gall. The latter may possibly be only 

 a modified form of the more common adherent gall which is also 

 inhabited byAsphondylia monachaO. S. Another species, 

 C. r u b i f o 1 i a Felt, has been reared from a marginal leaf roll on 

 high blackberry. The transformations in this group appear to occur 

 invariably in the tissues of the host plant. The forms producing 

 stem galls winter as larvae, the adults appearing in the spring or 

 early summer. 



Key to genera 



a Third vein very near costa and uniting therewith at or before the basal half, 

 very rarely near the distal third 

 b Mouth-parts and thorax normal, i. e. nob greatly prolonged 



c Third and fourth antennal segments not coalescent, at least separated 

 by a distinct constriction; pulvilli sometimes small or rudimentary 



d Palpi quadriarticulate ; claws simple Protaplonyx Felt 



dd Palpi biarticulate ; claws toothed or simple ..Stefaniella Kieff. 

 ddd Palpi uniarticulate 



e Mouth-parts distinctly produced ; claws toothed 



Baldratia Kieff. 



ee Mouth-parts not produced, normal ; claws simple 



A p 1 o n y x Perez 

 cc Third and fourth antennal segments coalescent or closely fused; pulvilli 

 always well developed 

 d Palpi with three or four segments 



e Three long veins, the fifth forked some distance from its base. . . . 



Lasioptera Meign. 



ee Four simple long veins Neolasioptera Felt 



dd Palpi with one or two (rarely three) segments. .Asteromyia Felt 



bb Mouth-parts and thorax prolonged; antennal segments io to 13 



Clinorhyncha H.Lw. 

 aa Third vein distinctly separated from costa and uniting therewith beyond the 

 basal half 

 b First antennal segment normal, not strongly produced; third vein strongly 



arched, it and the body not very thickly clothed with scales 



Camptoneuromyia Felt 

 bb First antennal segment produced, with a length about three times its diam- 

 eter, the third vein and the body thickly clothed with shining, fre- 

 quently silvery scales; ovipositor aciculate Trotteria Kieff. 



