Kinsey: The Genus Neuroterus 
103 
Neuroterus (Dolichostrophus) minutus (Bassett) 
bisexual forms 
Figures 44-46 
FEMALE. — Head brownish piceous, light yellow piceous on the 
lower part of the face and on the mouthparts; antennas light brownish 
yellow, light straw color basally, with 13 segments, the third more than 
half again as long as the fourth; thorax brownish piceous, about half 
again as long as wide and high, about naked of hairs; mesonotum and 
mesopleurae mostly smooth, only faintly roughened; abdomen brownish 
piceous, higher than long, not produced, or somewhat produced dorsally, 
triangulate; legs more or less wholly very light yellow; areolet of mod- 
erate size, more or less ; radial cell elongate, the first abscissa slightly 
arcuate; length 1. 2-1.7 mm. 
MALE. — Almost wholly brownish yellow, browner on the dorsal 
surfaces; the third segment of the antenna twice as long as the fourth, 
rather slightly curved; the eyes moderately enlarged; areolet somewhat 
larger than in the female. 
GALL. — An inseparable swelling, varying greatly, depending upon 
the part of the plant affected; on Quercus alba, Q. bicolor, and probably 
related white oaks. 
RANGE. — Connecticut to Pennsylvania. Probably thruout eastern 
North America. 
This species is the eastern equivalent of Neuroterus 
quercicola, differing mainly in having a lighter color, the 
abdomxen not produced, and the first abscissa slightly arcuate. 
The galls of variety minutus resemble leaf galls of quercicola. 
Neuroterus irregularis is closely related to minutus, but the 
males of the two are very distinct. 
The two varieties of minutus have what might appear to 
be radically different galls, but several similar cases of gall 
polymorphism are recorded in this paper for this genus. The 
galls of variety pallidus are ‘^monothalamous^^ clustered, seed- 
like, anther galls; those of minutus are irregular, polythala- 
mous, petiole or vein swellings. The diversity is probably the 
result of the relatively simple gall-producing physiologies of 
the insects and of the differences of the affected plant tissues. 
A consideration of gall polymorphism, and of the nature of 
anther galls, will be found in the introduction to this paper. 
That one of the varieties should be known only from the 
leaf galls on Q. alba, the other only from the ament galls 
on Q. hicolor may evidence merely our lack of sufficient data. 
Both galls may be found on both oaks, but if this is not 
