178 NEW YORK STATE MUSEUM 



ee Length 1.5 mm; dorsal plate deeply emarginate, the lobes 

 produced laterally and roundly emarginate; reared from 



fleshy leaf gall on Amelanchier 



canadensis Felt, C. ai 859 



tee Length i mm ; dorsal plate lobes diverging, rounded 



recurvata Felt, C. 361 

 etee Length .75 mm; dorsal plate roundly emarginate, the lobes 



hardly diverging, obliquely truncate 



f ragariae Felt, C. 328 

 di Abdomen yellowish red, length .75 mm; dorsal plate short, tri- 

 angularly emarginate, the lobes obliquely truncate; fifth 

 antennal segment having the stems two and one-half and three 



times their diameters emarginata Felt, C. 421, 34 



ddi Abdomen dark brown, length i mm; dorsal fifth antennal seg- 

 ment having the stems three and four and one-half times their 



diameters ruricola Felt, C. 293 



hh Ventral plate deeply and roundly emarginate, the lobes not diverging 

 strongly 

 c Fifth antennal segment having the stems equal or nearly so 

 d Lobes of the ventral plate diverging apically 



e Abdomen dark brown, length i mm; fifth antennal segment 

 having the stems each with a length three and one-half 



times its diameter apicalis Felt, C. 409, 367 



dd Lobes of the ventral plate nearly parallel, not diverging apically 

 e Lobes of the dorsal plate not strongly diverging 

 / Lobes of ventral plate slender 



g Abdomen pale yellowish orange or yellowish brown, 

 length I mm; fifth antennal segment having the 

 stems each with a length three and one-half 



times its diameter 



a g r a r i a Felt, C. 247, 621, 626, 632 



gg Abdomen dark yellowish brown, length .75 mm; 



fifth antennal segment having the stems with a 



length three and three and one-half times their 



diameters terrestris Felt, C. 371 



gig Abdomen dull red, length i mm; fifth antennal seg- 

 ment having the stems each with a length three 

 and one-half times their diameter; fourth palpal 



segment as long as the third 



sanguinia Felt, C. 385 

 iggg Abdomen reddish orange, length i mm; fifth anten- 

 nal segment having the stems each with a length' 

 two and one-half times their diameters; fourth 

 palpal segment one-fourth longer than the third; 



reared from an apple aphid 



aphidivora Felt, a23i6a 

 jj Lobes of ventral plate short, stout 



g Abdomen dark brown, length 2 mm; fifth antennal 

 segment, stems each with a length two and one- 



. half times its diameter 



a p r i 1 i s Felt, C. 1414 



