116 
Indiana University Studies 
of Comparative Zoology, the Philadelphia Academy, Stanford University, 
Cornell University, the British Museum, in the Weld collection, and in 
the Kinsey collection. From Friday Harbor, Washington; galls July 2, 
1911; adults July 30, 1911; Q. garryana; L. H. Weld collector. 
Weld's galls, collected on July 2, 1911, gave adults July 
30. This is considerably later than the March and April 
emergence of variety pacificus further south, and shows the 
considerable dependence of cynipid development upon the de- 
velopment of the host. 
The above descriptions are made from paratypes. The 
insect differs only slightly from pacificus, but has not gone 
the way of the usual synonomy. The gall is very much like 
that of pad ficus on Q. Douglasii. It is possible that the aments 
of garryana will show galls of variety w ashing tonensis simi- 
lar to the ament galls of pacificus on Q. lobata. The alternate 
generation of this insect may be either a similar leaf swelling, 
a woody stem swelling, or a cell in an acorn cup, and I have 
collected the latter gall at Ashland, Oregon. 
Neuroterus (Dolichostrophus) rileyi (Bassett) 
Figure 62 
FEMALE. — Head black; antennae with 13 segments, the third almost 
twice as long as the fourth; thorax entirely piceous black, distinctly 
narrow and elongate, almost twice as long as high or wide, narrower 
than the head, minutely hairy; mesonotum and mesopleurae minutely 
coriaceous; abdomen piceous, hardly as large as the thorax, somewhat 
produced ventrally, less produced in the agamic female, angularly 
rounded, borne on a short but very distinctly elongate petiole; legs in 
part yellow, in part brown; areolet rather large to small; cubitus meet- 
ing the basalis below the midpoint ( ! ) ; the first abscissa slightly arcu- 
ate, not at all angulate; length 1. 5-2.0 mm. 
MALE. — Whole body mostly brownish yellow, clear yellow on the 
antenna, the legs, and the base of the abdomen; eyes moderately en- 
larged; areolet smaller than in the female. 
GALL. — An irregularly continuous stem swelling. Polythalamous. 
The swelling rather restricted in size, 10. mm. long or less, raised 5.0 
nun. or less above the normal stem, asymmetric on the stem, but often 
many swellings fused to make a more or less continuous mass 80. mm. 
long and 12. mm. wide, lying all around the stem; covered with normal 
bark which is sometimes rather loose and wrinkled. Internally com- 
pact woody, the larval cells near the surfaces, with a distinct but wholly 
inseparable lining. On chestnut oaks (fig. 62). 
RANGE. — Massachusetts to Colorado; possibly transcontinental. 
