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............. 
UNn'Cisayn. sp. C. 527 
bb 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. a1758, a1558, a432 
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 Helianthus................. 
helianthi Brodie, C. a2453 
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 
cccc Abdomen yellowish brown; length 5 mm. Ventral plate moderately 
long and broadly rounded........... proteana Felt, C. 1521 
Females 
a Large, at least 4mm long. The flagellate antennal segments with 3 circumfila 
b Abdomen dark brown, the fifth antennal segment with a length two and 
one-half times its diameter................. modesta Felt C. 1346 
bb Abdomen dark reddish, the fifth antennal segment with a length three 
and one-half times its diameter, reared from a cockscomb gall on 
crataegusileaf. ieee cere eee crataegifolia Felt, C. a1362 
aa Small species, length 3.5 mm or less 
b Antennal segments with 3 circumfila 
c Abdomen dark carmine; ovipositor short, reared from a truncate 
leaf gallon Amelanchier.........canadensis Felt, C. a1758 
cc Abdomen dark brown, ovipositor as long as the abdomen, reared from 
a'tubular’stem ‘gall’on’ Helianthus e410) Ons f et 9. ae See 
helianthi Brodie, C. a2453 
ccc Abdomen brownish yellow, ovipositor one-half the length of the 
abdomen, reared from a globose leaf gall on Helianthus......... 
braille Pelt Cs 1267, 
bb 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 
PITA Sa teh LAN ade MOU ARE ae RRR clarkei Felt, C. a1759a 
cc Abdomen dark red, the fifth antennal segment with a length twice 
its diameter, the second palpal segment with a length one-half 
greater than its diameter. Reared from a subconic willow leaf 
C2 UNO BE ER tee wnat ee Ten (Nate he verruca Walsh, C. a1785 
