164 NEW YORK STATE MUSEUM 



aa Ventral plate long, slender, tapering distally 



b Dorsal plate rather long, triangularly emarginate, the lobes long and 

 narrowly triangular 



c Abdomen pale yellowish or carmine, length i mm; fifth antennal 

 segment having the stems with a length two and one-half and four 



times the diameters, respectively 



triangularis Felt, C. 428, 499 

 aaa Ventral plate long, rather stout, broadly rounded apically 

 b Dorsal plate short, the lobes truncate 



c Abdomen dark red, the segments margined with fuscous, length 

 I mm; fifth antennal segment having the stems with a length 

 two and one-fourth and four times the diameters, respectively, 



trinodose subtruncata Felt, C. 506 



cc Abdomen fuscous brown, length i mm; fifth antennal segment 

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



the diameters, respectively montana Felt, C. 631 



ccc Abdomen yellowish brown, length i mm; fifth antennal segment 

 having the stems with a length twice and two and one- half times 



the diameters respectively cinctipes Felt, C. 1522 



aaaa Ventral plate long, emarginate 



b Ventral plate tapering distally, roundly emarginate 



c Dorsal plate short, roundly emarginate, the fifth antennal segment 

 having the stems with a length one and one-half and two and 

 one-half times the diameters respectively; reared from roots of 



Cattleyagigas cattleyae Moll., C. 979 



cc Dorsal plate short, narrowly and triangularly emarginate, the lobes 

 produced laterally; abdomen yellowish, length i mm; fifth 

 antennal segment having the stems with a length two and one- 

 half and three and one-half times the diameters respectively . . 



r u b i s o 1 i t a Felt, C. 656 

 ccc Abdomen pale yellowish, length i mm. Reared from oak bark . . 



c o r t i c i s Felt, C. 1075 

 bb Ventral plate long, slender, broadly emarginate 



c Dorsal plate triangularly emarginate, the lobes truncate 



d Abdomen reddish brown, length .75 mm; fifth antennal seg- 

 ment having the stems with a length three and four times 



the diameters respectively extensa Felt, C. 228 



bbb Ventral plate long, broad, scarcely tapering, very broadly emarginate 



c Dorsal plate short, triangularly emarginate, the lobes truncate 



d Abdomen a fuscous reddish brown, length 1.5 mm; fifth 



antennal segment having the stems equal, each with a 



length three and one-half times its diameter; the lobes of 



the dorsal plate roundly truncate 



pratensis Felt, C. 741 

 dd Abdomen fuscous yellowish, fifth antennal segment having 

 the stems with a length two and one-half and three and one- 

 half times the diameters respectively; the lobes of the dorsal 

 plate broadly emarginate; reared from bud gall on spirea. . 



clarkeae Felt, C. a2074 



