202 



NEW YORK STATE MUSEUM 



Ovate, sessile, brownish, densely white-haired galls, length 7 mm, on Aster 

 crassulus. Felt '151, p. 237 



Itonid. Rhopalomyia crassulina Ckll. 



Acamptopappus spharocephalus 

 Gall-like swellings on tips of branches. Busck '03, p. 830 



Lepid. Gnorimoschema octomaculella Chamb. 



Erigeron canadensis (horseweed, butterweed) 



Reared from a scarcely discolored, inconspicuous blister mine. Fig. 230. Felt 

 '07a, p. 163 



Itonid. Horseweed blister midge, Asteromyia modesta Felt 

 Fusiform stem gall, length 2 cm. Fig. 231. Felt '07a, p. 163 



Itonid. Horseweed stem midge, Neolasioptera eriger- 

 on t i s Felt 



Fig- 233. Rhopalo- 

 myia ericameriae 

 Felt. Typical rosette 

 galls. (Original) 



Fig. 234. P a r a d i - 

 p 1 o s i s pa rt hen i - 

 i c o 1 a Ckll. (Origi- 

 nal) 



Erigeron fragilis 

 Oval apical bud gall, length 10 mm, diameter 7 mm. Fig. 232. Felt 'i6f, p. 189 

 Itonid. Rhopalomyia erigerontis Felt 



Sericocarpus asteroides (white-topped aster) 

 Apical, greenish bud gall. Felt 'i6d, p. 127 



Itonid. ? Nun midge, A s p h o n d y 1 i a m o n a c h a O. S. a2347 



Baccharis pilidaris (groundsel tree) 

 Flower bud or leaf gall, single or clustered, lobulate, greenish or reddish brown, 

 diameter 5 mm to 1.5 cm. Felt '151, p. 255 



Itonid. Rhopalomyia californica Felt 



