Il8 NEW YORK STATE MUSEUM 



GIARDOMYIA Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 405 



1910 Rubsaamen, E. H. Zeitsch. Wissenschaft. Insektenbiol., 15:287 



191 1 Felt, E. P. N. Y. Ent. Soc. Jour., 19:59 

 1913 Kiefifer, J. J. Gen.- Insect., fasc. 152, p. 230 



This genus is erected for certain species presenting marked dif- 

 ferences from Octodiplosis Giard. It comprises a number of small, 

 yellowish or reddish forms having the simple claws bent almost at 

 right angles and usually somewhat enlarged subapically. The ventral 

 plate is long, slender, slightly expanded apically and roundly emargi- 

 nate, while the dorsal plate is short, triangularly emarginate and with 

 the somewhat long lobes broadly rounded or truncate. The type 

 species is G. photophila Felt (pi. 38, fig. 2, Bui. 124). 



Key to Species 



a Abdomen yellowish 



b Abdomen pale yellowish, length .75 mm, the fifth antennal segment 

 having the stems two and one-half and three and one-half times their 



diameter; presumably reared from a pustulate gall on Mentha. . : 



m e n t h a e Felt, C. ai578b, 536 

 bb Abdomen fuscous yellowish, length i mm; fifth antennal segment having 



the stems three and four and one-half times their diameters 



noveboracensis Felt, C. 197X 

 aa Abdomen reddish 



b Abdomen bright carmine, length i mm; fifth antennal segment having 

 the stems three and four and one-half times their diameters. . . . 



photophila Felt, C. 323 



bb Abdomen bright red; terminal segments yellowish, length r mm; fifth 



antennal segments having the stems with a length three and three and 



one-half times their diameters, the ventral plate deeply and narrowly 



emarginate emarginata Felt, C. 446 



bbb Abdomen deep reddish, length i mm; fifth antennal segment having the 



stems two and one-half and four times their diameters 



hudsonica Felt, C. 200 



bbbb Abdomen dark reddish brown, length i mm; fifth antennal segment 



having the stems two and one-half and three and one-half times 



their diameters montana Felt, C. 325, 585 



Giardomyia menthae Felt 

 1908 Felt, E. P, N. Y. State Mus. Bui. 124, p. 405 

 1918 N. Y. State Mus. Bui. 200, p. 184 



This yellowish male was reared July 27, 1907, from mint. 

 Mentha canadensis, bearing pustule-like stem galls collected 

 at Karner, N. Y. 



Gall. Length 3.5 mm, diameter 2.5 mm. This is a pustule-like 

 gall in the axil of the leaf and contains several whitish larvae. 



Larva. Length i mm, whitish. 



