LEPIDOPTEHA DIPTERA 1129 



Injury Larva ties together a cluster of leaves and feeds within. ' 

 Distribution Europe. 



References Ka.ltenbach, J. H. Pflanzenfeinde, p, 210. 1872. 

 Spuler, A. Schmetterlinge Europas, 2:358. 1910. 



DIPTERA 



absobrina Felt, Rhizomyia Fam. Cecidomyiidae 



Hosts Crataegus, Populus, Prunus virginiana. 



Injury Larva found in leaf gall. 



Distribution North America. 



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



anthobia F. Loew, Contarina Fam. Cecidomyiidae 



Host Crataegus oxyacantha. 



'Injury Solitary larva feeds in blossom bud, causing it to remain closed and swollen. 

 Distribution Europe. 



References Ross, H. Die Pflanzengallen Mittel- und Nordeuropas, p. 132. 1911. 

 Basjnall, R. S., and' Harrison, J. W. H. Ent. Soc. London. Trans. 1917: 391. 

 1917. 



bedeguar Walsh, Cecidomyia (Tufted thorn gall) .Fam. (Cecidomyiidae 



Host Crataegus. 



Injury Larvae deform leaves with filamentous subglobular vein galls, 1 cm. long, 



generally found on the midveins. 

 Distribution North America. 

 References Walsh, B. D. Can. ent. 1 : 79. 1869. 



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



cerasifolia Felt, Mycodiplosis Fam. Cecidomyiidae 



Hosts Prunus virginiana, Crataegus. 



Injury Larvae live' in galls on hawthorn fruit caused by Gymnosportmgium clavipes, 



and feed on the rust spores. 

 Distribution North America. 



References Felt, E. P. New York State Mus. Bui. 200: 152. 1918. 

 Wellhouse, W. H. Ent. news 30: 144. 1919. 



circumdata Winn., Perrisia Fam. Cecidomyiidae 



Host Crataegus oxyacantha. 



Injury Larva lives in leaf gall. 



Distribution Germany. 



References Kaltenbach, J. H. Pflanzenfeinde, p. 212. 1872. 



Kieffer, J. J. Genera insectorum, fasc. 152, p. 75. 1913. 



crataegi Winn., Perrisia Fam. Cecidomyiidae 



Host Crataegus oxyacantha. 



Injury Colonies of larvae cause rosettes of deformed sessile leaves, which make trees 



and hedges unsightly. 

 Distribution Europe. 

 References Kaltenbach, J. H. Pflanzenfeinde, p. 212. 1872. 



Connold, E. T. British vegetable galls, p. 190. 1902. 



crataegifolia Felt, Hormomyia (Thorn cockscomb gall) Fam. Cecidomyiidae 



Host Crataegus. 



Injury Larva deforms leaf with a green or red gall 1 cm. long, shaped like a cockscomb. 



Distribution United States. 



References Felt, E. P. Journ. econ. ent. 1 : 20. 1908. 



Felt, E. P. New York State Mus. Bui. 200: 136. 1918. 

 (Figs. 116 and 117, pa^e 10 32.) 



