Kinsey: The Genus Neuroterus 
107 
Five of the varieties of this species have been previously 
described, but without any recognition of the relationships 
involved; I have only one new variety to contribute; more 
important is the pointing out of the specific unity of the group. 
On circumstantial evidence, I would recognize the alternate 
generation of variety pacificus. This is the first cynipid life 
history for the Pacific Coast, and one of interest as an 
advanced step in heterogeny in Neuroterus; involving different 
types of galls on different hosts without varietal segregations. 
This is described under pacificus. 
Remarkable polymorphism is shown by the galls of each 
of the two generations of pacificus. Here are further data 
on the extent to which the plant influences the character of 
the gall. This is discussed under form varians. 
About 16 varieties may be found in the several faunal 
areas of the deciduous and evergreen white oaks of western 
United States. 
Neuroterus quercicola variety cougregatus Gillette 
bisexual form 
Neuroterus cougregatus Gillette, 1893, Ent. News, IV, p. 166. Dalla 
Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., p. 50; 1910, Das 
Tierreich, XXIV, pp. 339, 808. Beutenmuller, 1910, Bull. Amer. 
Mus. Nat. Hist., XXVIII, p. 133. Thompson, 1915, Amer. Ins. Galls, 
pp. 12, 40. Felt, 1918, N.Y. State Mus. Bull., 200, p. 76. 
FEMALE. — Probably with the antennse basally light brownish 
yellow; the legs dull, light brownish yellow, in part dark brown; the 
areolet of moderate size; the length about 1. 5-2.0 mm. 
MALE. — As described for the species; pleurae wholly piceous brown ; 
the antennae basally and the legs dull, light brownish yellow, in part 
suffused with darker brown. 
GALL. — Typical for the species ; described as a terminal twig 
swelling, 6.-8. mm. in diameter, with larval cells developing within the 
bud, and covered with a pubescence; or merely larval cells buried in the 
twig; on Quercus (Gambelii?) . 
RANGE. — Colorado: Manitou (Gillette). Probably confined to a 
limited area of the foothills east of the Continental Divide. 
TYPES. — Males and, galls in the Gillette collection (?) and the 
U.S. National Museum. From Manitou, Colorado; May 8-17, 1892; 
Gillette collector. 
Gillette's insects were taken at Manitou, Colorado, emerg- 
ing from May 8 to 17 ; they were all males. The host was 
not named, but it was probably Quercus Gambelii, which is 
