Midge Galls 



2 Spiraea pod gall, Rhabdophaga salicifolia Felt. (After 



Thompson) 

 I Willow twig deformed by Rhabdophaga salicis Schr. 



3 Willow tips showing blasted apical buds, the work of Cecidomyia sp., 



adult unknown. 



4 Wheat ear gall, Rhabdophaga triticoides Walsh, on willow. 



5 Downy flower gall, Rhopalomyia anthophila O. S. (After Weld) 



6 Beaked flower gall, Rhopalomyia racemicola O. S. (After Weld) 



7 Solidago showing subterranean bud galls of Rhopalomyia bulbula 



Felt. (After Thompson) 



8 Galls of gooseberry bud midge, Rhopalomyia grossulariae 



Felt. (After Houser) 



9 Root stalk bud midge, Rhopalomyia h i r t i p e s O. S. (After 



Stebbins) 



266 



