214 



NEW YORK STATE MUSEUM 



Sonchus (sow thistle) 



Reared from stems. Ashm. '970, p. 134 



Cynipid. Lettuce tumor gall. Aulacidea tumida Bass. 



Encelia 

 Leaf bud gall, length 10 mm, diameter 4 mm. Felt 'i2e, p. 152 



Itonid. Asphondylia enceliae Felt 

 Conical, thick-walled, lateral bud gall, length 6 mm, diameter 3 mm, frequently 

 confluent basally, sometimes twisting the stem and producing a marked 

 deformation. Felt 'i6f, p. 183 



Itonid. Rhopalomyia enceliae Felt 



Lygodesmia 



Oval or pea-like, monothalamous stem galls, diameter 5 to 12 mm. Fig. 235, 10. 

 Beutm. 'loa, p. 142 



Cynipid. Aylax pisum Walsh 



Fig. 250. Lasioptera 

 p a 1 u s t r i s Felt. A group of 

 galls, one sectioned. (Original) 



Prenanthes (rattlesnake-root) 



Flat, purplish leaf gall, length 2 to 3 mm. Felt '13d, p. 417 



Itonid. Cystiphora canadensis Felt 



Irregular, polythalamous, basal, stem swelling somewhat resembling small, 

 knotty artichokes, diameter 5 to 10 mm. Fig. 249. Beutm. 'lob, p. 256 



Cynipid. Aulacidea nabali Brodie 



