KEY TO AMERICAN INSECT GALLS 



159 



Rhus (sumac) 



Subcortical stem gall. Felt 'iij, p. 46S 



Itonid. C e c i d o m y i a sp. 



Reared from dead twigs. Felt '14b, p. 113 



Itonid. Parallelodiplosis cinctipes Felt 

 Globose root galls on poison dogwood. Felt '156, p. 146 



Itonid. Sumac root gall, Dasyneura rhois Coq. 

 Infertile seeds. Crosl:)y '09, p. 385 



Hym. E u r y t o m a rhois Crosby 

 Stunted heads or curled leaves. Fig. 164, pi. 16, fig. 7. Felt 'o8e, p. 404 



Acarid. E r i o ]) h y e s sp. 



Fig. 164. Sumac leaves 

 deformed by Eriophyes from 

 which Arthrocnodax 

 r h o i n a Felt was reared. 

 (Original) 



Fig. 163. Su- 

 mac bud gall, 

 Asphondy- 

 lia i n t e gr i - 

 f o 1 i a e Felt. 

 (Original) 



Probably preying on a plant mite. 



Itonid. Arthrocnodax rhoina Felt 

 Subglobular flower bud gall, diameter 3 mm. Fig. 165. Felt 'i6d, p. 126 



Itonid. Sumac bud gall, Asphondylia integrifoliae Felt 

 An erineum on the leaves of R. r a d i c a n s . Chadwick '08, p. 144 



Acarid. Eriophyes sp. 

 Irregular, rounded, green to red or purple dimple galls, usually in granular heaps, 

 on R. radicans. PI. 16, fig. 6. Chadwick '08, p. 144 



Acarid. Eriophyes sp. 



