1130 DlPTERA 



crataegifolia Felt, Lestodiplosis (Hawthorn f ringed-cup gall) Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larva causes a gall on leaf or twig. 

 Distribution United States. 



References Felt, E. P. New York State Mus. Bui. 124:408. 1908. 

 Felt,' E. P. New York State Mus. Bui. 200:138. 1918. 

 (Figs. 114 and 115, page 1081.) 



excavata Felt, Lasioptera (Purple leaf blotch) Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larvae deform leaves with green or reddish, blister-like mines, about 8 mm. 



in diameter. 



Distribution United States. 

 Reference Felt, E. P. New York State Mus. Bui. 200:138. 1918. 



hirta Felt, Rhizomyia Fam. Cecidomyiidae 



Host Crataegus. 



Injury Species probably inquiline in blister mine made by Lasioptera excavata. 



Distribution United States. 



Reference Felt, E. P. New York State Mus. Bui. 200: 138. " 1918. 



hudsonici Felt, Winnertzii Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larva deforms leaf with stout, cup-shaped, fimbriate, unicellular gall. 



Distribution United States. 



Reference Felt, E. P. New York State Mus. Bui. 200: 138. 1918. 



pomonella Walsh, Rhagoletis (Apple maggot) Fam. Trypetidae 



Hosts Crataegus, Malus, Vaccinium, Symphoricarpos. 



Injury Larva tunnels in fruit. 



Distribution Eastern North America. 



References Walsh, B. D. First annual report on noxious insects of Illinois, p. 30. 



O'Kane, W. C. New Hampshire Agr. Exp. Sta. Bui. 171. 1914. 

 Severin, H. H. P. State Comm. Hort. California. Mo. bul. 7:430. 1918. 



venae Felt, Lobopteromyii (Thorn vein gall) Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larva causes oval, smooth, fleshy gall, 5 to 8 mm. long, on leaf vein. 

 Distribution United States. 



'Reference Felt, E. P. New York State Mus. Bul. 200:138. 1918. 

 (Figs. 118 and 119, page 1083.) 



venitalis Felt, Dicrodiplosis Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larva found in same gall with Lobopteromyia venae. 



Distribution United States. 



Reference Felt, E. P. New York State Mus. Bul. 200 : 138. 1918. 



Cecidomyia sp. (a. 2727 Felt) Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larvae cause subglobose, greenish, sometimes confluent, frequently pointed, 



polythalamous vein galls, the under side reddish, diameter 3 mm. 

 Distribution United States. 

 Reference Felt, E. P. New York State Mus. Bul. 200 : 138. 1918. 



Cecidomyia sp. (a. 1840 Felt) (Thorn spindle gall) ,Fj,.n. Cecidomyiidae 



Host Crataegus. 





