REPORT OF THE STATE ENTOMOLOGIST I907 359 



Viola (violet) 

 Rolled leaves Mayctiola (Diplosis) violicola, C. 3x346 



Vitis (grape) 

 Tumid leaf (vitis) gall J a n e t i e 1 1 a b r c v i c a u d a , C. 878 



Key to genera 

 a Palpi uni or biarticulate 



b Ovipositor of female short, enlarged, triangular; terminal clasp seg- 

 ment of male distinctly prolonged, not fusiform. . .Walshomyia n. g. 

 bb Ovipositor of female short with the sickle-shaped plate projecting 



dorsally Sackenomyia n. g. 



bbb Ovipositor of female fleshy, at least moderately long, not enlarged, 

 terminal lobes rather short and stout; terminal clasp segment of 



male short, stout, fusiform Rhopalomyia Rubs. 



aa Palpi triarticulate Oligotrophus Latr. 



aaa Palpi quadriarticulatc 



b 3d vein uniting with costa at the apex of the wing. ..Mayetiola Kieff. 



bb 3d vein uniting with costa well before the apex of the wing 



Janetiella Kiel¥. 



WALSHOMYIA n. g. 



This genus appears to be intermediate between Rhopalomyia and 

 Rhabdophaga. It has i8 or 19 antennal segments, those of the 

 male distinctly stalked, with but one palpal segment and simple 



Fig. 33 Walshomyia juniperina, male and female antennal segments, much enlarged. (Origin 



