222 NEW YORK STATE MUSEUM 



ccccc Abdomen pale reddish; length 4 mm; fifth antennal segment with 

 stems one and one-half and two and one-half times their diameters 



respectively; ventral plate narrow, narrowly incised 



i n c i s a n. sp. C. 527 

 hh Palpi biarticulate 



c Abdomen dark reddish brown; length 2 mm, the second palpal seg- 

 ment not three times the length of the first, the fifth antennal seg- 

 ment with stems two and one and one-half times their diameters 

 respectively; ventral plate long, broad, roundly and slightly 



emarginate. Reared from truncate gall on Amelanchier 



canadensis Felt, C. ai758, 31558, 3432 



cc Abdomen dark yellowish brown; length 2.5 mm, flagellate antennal 



segments with stems one-half and three-fourths their diameters 



respectively; second palpal segment reduced; ventral plate short; 



reared from a tubular stem gall on HeHanthus ' 



helianthi Brodie, C. 32453 

 ccc Abdomen dark reddish brown; length 1.5 mm. Flagellate antennal 

 segments with stems with a length one and one-fourth and one 

 and one-half times their diameters respectively, second palpal seg- 

 ment greatly produced; ventral plate short, broadly rounded 



bulla Felt, C. 1267 



cue Abdomen yellowish brown; length 5 mm. Ventral plate moderately 



long and broadly rounded proteana Felt, C. 1521 



Females 

 a Large, at least 4 mm long. The flagellate antennal segments with 3 circumfila 

 h Abdomen dark brown, the fifth antennal segment with a length two and 



one-half times its diameter modesta Felt C. 1346 



hh Abdomen dark reddish, the fifth antennal segment with a length three 

 and one-half times its dianieter, reared from a cockscomb gall on 



Crataegus leaf crataegifolia Felt, C. 31362 



aa Small species, length 3.5 mm or less 



h Antennal segments with 3 circumfila 



c Abdomen dark carmine; ovipositor short, reared from a truncate 



leaf gall on Amelanchier canadensis Felt, C. 31758 



cc Abdomen dark brown, ovipositor as long as the abdomen, reared from 



a tubular stem gall on Helianthus 



heli3nthi Brodie, C. 32453 

 ccc Abdomen brownish yellow, ovipositor one-hslf the length of the 



abdomen, reared from a globose leaf gall on HeUanthus 



bulls Felt, C. 1267 

 hh Antennal segments with 2 circumfila 



c Abdomen dark reddish, the fifth antennal segment with a length two 

 and one-half times its diameter, the second palpal segment three 

 times as long as the first. Reared from a terminal bud gall on 



Spiraea clarkei Felt, C. 317593 



cc Abdomen dark red, the fifth 3ntenn3l segment with 3 length twice 

 its diameter, the second palpal segment with a length one-half 

 greater than its diameter. Reared from a subconic willow lesf 

 srall verruca Walsh, C. 31785 



