Midge Galls 



1 Balsam gall midge, Cecidomyia balsamicola Lintn. (After 



Thompson) 



2 Gall of Cecidomyia sp., on balm of Gilead 



3 Hazel catkin gall, Cecidomyia squamulicola Stebb. 



4 Touch-me-not gall, Cecidomyia impatientis O. S. (After 



Thompson) 



5 Gall on cherry racemes produced by Cecidomyia racemi Stebb. 



(After Stebbins) 



6 Wild cherry bud gall, Cecidomyia serotinae O. S. (After Clarke) 



7 Smilax blister, Camptoneuromyia rubifolia Felt. 



8 Nettle bullet gall, Cecidomyia sp. on Urtica. (After Weld) 



9 Linden wart gall, Cecidomyia verrucicola O. S., young galls. 



(After Thompson) 



2s6 



