Kinsey: The Genus Neuroterus 
121 
reich, XXIV, pp. 333, 801. Beutenmuller, 1910, Bull. Amer. Mus. 
Nat. Hist., XXVIII, p. 126. Felt, 1918, N.Y. State Mus. Bull., 200, 
p. 54. Kinsey, 1920, Bull. Amer. Mus. Nat. Hist., XLII, p. 395. 
Neuroterus virgeus Thompson, 1915, Amer. Ins. Galls, pp. 5, 41. 
FEMALE. — Antennse basally clear yellow; the thorax laterally 
piceous brown; the abdomen piceous brown; the legs clear yellow, dis- 
tinctly brown on the femora and the hind tibiae; the areolet less than 
a moderate size; the length 1.5-2.0 mm. 
GALL. — Probably as described for the species; the types small, 
with only a slight swelling. On twigs of Quercus Gamhelii. 
RANGE. — Colorado: Manitou (Gillette). 
TYPES. — Type females and galls in the U.S. National Museum 
(and the Gillette collection?). From Manitou, Colorado; May 8 to 13, 
1892; Gillette collector. 
Gillette’s insects were all females, not males as Beuten- 
muller stated. They were reared between May 8 and 13. 
The host was not recorded, but was probably Q. Gamhelii, 
the common oak of the region. I have not seen material 
certainly known to be types, but I have seen material from 
the U.S. National Museum collected by Baker and determined 
by Baker; Mr. Weld says that these insects agree with the 
type of virgens. The insect certainly belongs to the same 
species as rileyi, as the elongate thorax and the origin of the 
cubitus below the midpoint of the basalis show. This is the 
only record of a variety of rileyi occurring on other than 
chestnut oaks, and the only record of the species west of the 
100th meridian. This may suggest that the species occurs on 
white oaks of several groups and that it is transcontinental. 
Neuroterus subgenus Neospathegaster, new subgenus 
Only a single species, confined to eastern North America, 
is known in this subgenus, and the following descriptions 
will apply to the subgenus and the species. 
TYPE. — Cynips vesicula BsiSsett^N euroterus (Neospath- 
egaster) vesicula variety vesicula. 
Neuroterus (Neospathegaster) vesicula (Bassett) 
bisexual forms 
Figures 9-11, 15, 16, 21, 47, 48 
FEMALE. — Eyes rather large, hardly extending beyond the cheeks; 
cheeks narrow; malar space of moderate width, with a distinct furrow; 
