34 
Indiana University Studies 
16. Legs of female almost wholly light yellow; male with 
third antennal segment twice as long as the fourth; 
eastern North America, N. minutus 
a. Coxse wholly light yellow; galls on Q. alha. 
var. minutus 
5. Coxse in part piceous ; galls on Q. hicolor. 
var. pallidus 
Legs of female in part brown or black; male with third 
antennal segment something more than half again as 
long as the fourth; western North America. 
N. quercicola 
a. Antennse brownish yellow basally ; the areolet of mod- 
erate size; pleurse of male piceous brown; in more 
eastern Colorado ; on Q. Gamhelii. var. congregatus 
h. In more southern California; on Q, dumosa, 
var. fragilis 
c. Antennse light yellow basally; the areolet moderately 
small; pleurse of male brownish yellow; Central Cal- 
ifornia; on Q. lobata and Q. Douglasii, var. pacificus 
d. Antennse light brownish rufous basally; the areolet 
very small; Southwest; on Q. grisea. var, pubescens 
e. Antennse golden yellow basally; areolet quite small; 
Utah; on Q, Gamhelii. var. quercicola 
/. Antennse golden yellow basally; areolet of moderate 
size; northern Pacific Coast; on Q. garryana. 
var. washingtoneusis 
17. Antennse basally and legs golden yellow; abdomen wholly 
black; male with head yellow; eyes moderately enlarged, 
the third antennal segment hardly longer than 1+2 ; galls 
with individual cells evident externally; California; on 
Q. douglasii. N. decipiens 
Antennse basally and legs yellow or straw white ; abdomen 
in part piceous; male with head black; eyes greatly en- 
larged, the third antennal segment half again as long 
as 1+2 ; galls with the individual cells not visible exter- 
nally; eastern North America. N. irregularis 
a. Male with mesonotum dark brown only anteriorly; 
the scutellum often as wide as long; Texas, on Q. 
breviloha. var, albipleurae 
