KEY TO AMERICAN INSECT GALLS 



207 



Tubular, axillary bud gall, length 10 to 25 mm. Fig. 238. Felt '13d, p. 418 



Itonid. Tubular bud gall, Hormomyia helianthi Brodie 

 Reared from undetected gall. Felt 'oje, p. 7 



Itonid. Neolasioptera helianthi Felt 



A ctinomeris alternifolia 

 Globose bud gall. Beutm. '07c, p. 391 



Itonid. Cecidomvia ? verbesinae Beutm 



Helenium (sneezeweed) 

 Apical rosette gall, length 2 to 3 cm. Beutm. '07c, p. 383. Felt 'i6d, p. 137 



Itonid. Asphondylia autumnalis Beutm. 

 Small stems with the pith tunneled by orange-colored larvae 



Itonid. Cecidomyia sp. a274 



ji:..*-|.s-(i,'V ■■■'"fh-My 

 ^^■^^ 



Fig. 239. R h o - 

 palomyia alti- 

 c o 1 a Ckll. (Au- 

 thor's illustration) 



Fig. 240. D i a r t h -^ 

 ronomyia floc- 

 c o s a Felt. (Original) 



Fig. 241. 

 D ia r t h - 

 ronomyia 

 c a 1 i f o r - 

 n i c a Felt. 

 Three galls. 

 (Original) 



Fig. 242. Rhopalo-~S 

 myia betheliana 

 Ckll. Cluster of galls. 

 (Original) 



Achillea (yarrow) 



Florets apparently normal. Felt 'o8e, p. 333 



Itonid. Yarrow flower midge, Clinorhyncha millefolii 



Wachtl. 

 Irregularly oval, flower bud gall with a whitish pubescence, length 7 mm. 



Itonid. PRhopalomyia millefolii H. Lw. 



Anthemis (chamomile) 



Larvae in flower heads. Felt 'iij, p. 453 



Itonid. Cecidomyia sp. 



