KEY TO AMERICAN INSECT GALLS 



201 



Oval twig gall, length i .5 cm, on Aster novae-angliae. Felt '151, 



P- 259 



Itonid. Rhopalomyia astericaulis Felt 

 Fusiform stem or branch gall, length i cm, diameter 4 cm. Fig. 228. Beutm. 

 '07c, p. 392 



Itonid. Aster stem gall, Neolasioptera ramuscula Beutm. 

 Fusiform, greenish brown, irregular stem swelling at or near the base of the leaf, 

 length I cm, diameter .6 cm, on Aster infirm us. Fig. 229. Felt 

 '07a, p. 153 



Itonid. Neolasioptera albitarsis Felt 



Fig. 230. 

 Horseweed blis- 

 ter midge, A s- 

 t e r o m y i a 

 m o d e s t a 

 Felt. (Author's 

 illustration) 



m 



Fig. 231. 

 Horseweed stem 

 midge, N e o - 

 lasiopter a 

 erigerontis 

 Felt. (Original) 



Fig. 232. 

 R ho p a 1 o - 

 myia erige- 

 r o n t i s Felt. 

 Typical . gall. 

 (Original) 



Fusiform stem gall, length 2 cm, diameter i cm, on Aster umbellatus- 

 Fyles 'II, p. 135 



Lepid. Gnorimoschema gallaediplopappi Fyles 

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

 Aster divaricatus, Solidago latifolia and S. c a e s i a . 

 Busck '11, p. 6 



Lepid. Gnorimoschema gallaeasteriella Kell. 



Spindle-shaped, stem or root galls, length 15 mm, diameter 6 to 8 mm, near'or 



beneath the surface' of the ground, on Aster multiflorus. Busck 



'II, P- 5 



Lepid. Gnorimoschema subterranea Busck 



