io8 



NEW YORK STATE MUSEUM 



1864 

 1867 

 1868 



v i t i s 

 1869 



v i t i s 

 1873 



Schizomyia coryloides Walsh & Riley 

 Grape filbert gall 



Walsh, B. D. Ent. Soc. Phil. Proa, 3:588-91 (Cecidomyia) 



Ent. Soc. Phil. Proa, 6:224 (Cecidomyia) 



& Riley, C. V. Amer. Ent., 1:106-7 (Cecidomyia 



(Cecidomyia 

 (Cecidomyia 

 Mem. 



coryloides) 



Packard, A. S. Guide Study Ins., p. 376-77 



coryloides) 



Riley, C. V. Ins. Mo., 5th Rep't, p. 1 16-17 

 vitis-coryloides) 



1906 Felt, E. P. Ins. Affect. Prk. & Wdld. Trees, N. Y. State Mus. 

 8, 2:745 (Cecidomyia) 



1908 N. Y. State Mus. Bui. 124:379 



1909 Burrill, A. C. Wis. Nat. Hist. Soc. Bui. 7:130 (Cecidomyia) 



1910 Stebbins, F. A. Springf. Mus. Nat. Hist. Bui. 2:44 



The gall of this species occurs on grape. Apparently the same 

 gall is found on wild frost grape in Illinois and was described and 

 figured by Messrs Walsh and Riley in 1868. They state that the 

 gall develops from a common center at a point where a bud would 

 ordinarily occur. Occasionally a normal leaf grows from some por- 

 tion of the mass and sometimes bears two galls at the juncture of 

 the stem with the leaf. Each gall is one celled, the cavity being 



Fig. 6 Schizomyia coryloides. a, fifth and sixth antennal segments 

 of male, the reverse shown in outline; b, palpus, enlarged (original) jj '£ 



about one-fourth of an inch long, one-fourth as wide and contain- 

 ing a single larva. Large specimens of this gall beara^'general resem- 

 blance to a bunch of filbert or hazelnuts as they grow on a bush, 

 which led to the designation " vitis-coryloides." Galls of this species 



