15 Gall of Cecidomyia species on nettle, Urtica gracilis, 



adult unknown 



16 Gall of Cecidomyia urnicola O. S. on Urtica 



gracilis, adult unknown 



17 Peculiar adherent type of gall, potentially a bud deformation, 



on solidago from which has been reared both the nun midge, 

 Asphondylia monachaO. S. and Camptoneur- 

 omyia adhesa Felt 



18 Gall on leaf stem of Vitis labrusca produced by S c h i z - 



omyia petiolicola Felt 



19 Swelling at base of leaf stalk of wild cherry produced by 



Cecidomyia species, adult unknown 



20 Another type of the same deformity 



219 



