KEY TO AMERICAN INSECT GALLS 



201 



Oval twig gall, length 1.5 cm, on Aster n o v a e - a n g 1 i a e . Felt '15!, 



P- 259 



Itonid. R h o p a 1 o m y i a a s t c r i c a u 1 i s Felt 

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

 '07c, p. 392 



Itonid. Aster stem gall, N e o 1 a s i o p t e r a r a m u s c u 1 a Beutm. 

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

 length I cm, diameter .6 cm, on Aster i n f i r m u s . Fig. 229. Felt 

 '07a, p. 153 



Itonid. Neolasioptera all) it arsis 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) 



Fig. 231. 

 Horseweed stem 

 midge, N e o - 

 lasiopter a 

 erigerontis 

 Felt. (Original) 



Fig. 232. 

 R h o p a 1 o - 

 my i a e rige- 

 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. Soli dago 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 



