1139 DIPTERA 
crataejzifolia Felt, Lestodiplosis (Hawthorn fringed-cup gall) Sophvan See Fam. Cecidomyiidae 
Host — Crataegus. 
Injury — Larva causes a gall on leaf or twig. 
Distribution — United States. 
pp iefenctices — Felt, E. P. New York State Mus. Bul. 124:408. 1908. 
Felt, E. P. New York State Mus. Bul. 200:1388. 1918. 
(Figs. 114 and 115, page 1081.) 
excavata Felt, Lasioptera (Purple leaf blotch).......................-- Fam. Cecidomyiidae 
Host — Crataegus. 
Injury y — 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. Bul. 200:138. 1918. 
hirta Felt, Rhizomyia........ SRR ae nL eR ie MRR RS TE Me oo. gt 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. Bul. 200:138. 1918. 
hudsonici Belt (Wannentzta 2-8 oe 6 a ee a eee eee 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. Bul. 200:138. 1918. 
pomonella Walsh, Rhagoletis (Apple maggot)..........................45- 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. 
1868. | 
O’Kane, W. C. New Hampshire Agr. Exp. Sta. Bul. 171. 1914. 
Severin, H. H. P. State Comm. Hort. California. Mo. bul. 7:430. 1918, 
venze Felt, Lobopteromyia (Thorn vein gall)......................-2:. 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.) 
ventialisehelizyDicroduplosismetis a seis ee ieee Oo eee 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. 
Gecidomytaisps (an2i2isbelt)oe ces sees ance a ae ee 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).................... Fan. Cecidomyiidae 
Host — Crataegus. 
