KEY TO AMERICAN INSECT GALLS 



197 



Cylindric, apical bud gall on subterranean root stalk,, length 6 mm, diam- 

 eter 2.5 mm. PI. 12, fig. 7. Felt '15!, p. 260 



Itonid. Rhopalomyia bulbula Felt 

 Globular stem gall, diameter 2.5 cm, the interior pithy, with an oval cell 

 in the center. Fig. 220. Stebb. '10, p. 51 



Dipt. Goldenrod ball gall, Eurosta solidaginis Fitch 

 Oval, stem gall, length i cm, diameter 4 to 5 mm. PL 4, fig. 8. Stebb. '10 

 P-5I 



Lepid. Scarred goldenrod gall, Eucosma scudderiana Clem. 

 Oval, stem gall onS. sempervirens. Busck 'it, p. 4 



Lepid. Gnorimoschema salinaris Busck 

 Gall just above or close to the ground, on S. r i g i d a . Busck '15, p. 82 

 Lepid. Gnorimoschema gibsoniella Busck 



Fig. 222. A s- 

 phondylia 

 chryso thamn i 

 Felt. Infested 

 heads. (Original) 



Fig. 223. Eu- 

 rosta big- 

 eloviae Ckll. 

 (Original) 



Fig. 224. Rhopalo- 

 myia utahensis Felt. 

 Bud galls, one in section. 

 (Original) 



Fusiform, stem gall, length 3 mm, diameter 1.5 cm, usually near the 

 ground, on Solidago latifolia, S. caesia and Aster 

 divaricatus. Busck '11, p. 6 



Lepid. Gnorimoschema gallaeasteriella Kellicott 

 Elongate, spindle-shaped, stem enlargement ofS. canadensis. Fig 

 221. Stebb. '10, p. 51 



Lepid. Elliptical goldenrod gall, Gnorimoschema gallae 



solidaginis Riley 

 Ovoid, solitary or clustered, fleshy, bud galls on the root stalk, length 

 5 mm, diameter 3 mm. PI. 13, fig. 4. Felt '15!, p. 257. 



Itonid. Rhopalomyia thompsoni Felt' 

 Cylindrical, hollow, budlike gall near the surface, length 2 cm, diameter 

 .5 cm. PI. 4, fig. 4. Stebb. '10, p. 52 



Dipt. Eurosta reticulata Snow 



1 Possibly a synonym of R. h i r t i p e s. 



