KEY TO AMERICAN INSECT GALLS 



175 



Yellowish, purple-margined blister leaf gall, diameter 2 to 3 mm, on C. 

 s t o 1 o n i f e r a. PI. 13, fig. 9. Felt '07a, p. 107 



Itonid. Dogwood spot gall, Lasioptera corni Felt 

 Irregular, subcortical, stem gall, length i to 2 cm, onC. stolonifera. Fig. 

 187, 188. Beutm. '07, p. 394 



Itonid. Dogwood tu^^s gall^ Neolasioptera cornicola 



Beutm. 

 An erineum in small, blackish spots, on the upper side of the leaf. Chad wick 

 '08, p. 131 



Acarid. Eriophyes sp. 



Fig. 186. Dogwood club gall, Lasiop- 

 tera clavula Beutm., several types. 

 (Original) 



Fig. 187. Dogwood stem gall, 

 Neolasioptera cornicola 

 Beutm. (Original) 



Nyssa (black or sour gum) 



Twig gall, length 4 to 5 cm, diameter 8 mm. Felt '11 j, p. 464 



Itonid. Cecidomyia sp. 

 Marginal leaf fold, length 2.5 to 3.5 mm. Beutm. '07, p. 387 



Itonid. Cecidomyia nyssaecola Beutm. 

 Small, round capsule gall on the leaf, often lobed above, conical below, with 

 an opening at the apex. Chadwick '08, p. 136 



Acarid. Eriophyes n.yssae Trott. 



