482 
[March 
bably these may belong to the true G-all-fly, and it may go under¬ 
ground to assume the pupa state. A gall that I then cut into had a 
living, or at all events a succulent whitish larva in it, and one cut into 
in February had three such larvae all in one ordinary sized cell. The 
former was probably the larva of the Gruest gall-fly; the latter might 
have been Chalcididous, though I bred no Chalcididm from these galls, 
as I have done from almost all the other kinds which have afforded me 
Cynipidae. Eight of these galls cut open April 1st. contained each a 
single dead and dried up orange-colored larva, apparently Cynipidous, 
and probably identical with those found at the bottom of the jar. 
There was no earth in the jar for the larvae when they came out of the 
galls to burrow into. Four-flfths of the galls are found in the winter 
to be burst open at the top and vacated by their tenants, which most 
likely had gone underground in the preceding autumn. Frequently 
at that period the whole top of the gall is abraded, so as to leave 
nothing but a flat ring on the leaf. 
GrUEST G A EL-FLY, Amhli/notus inermis n. sp. Came out May 18th 
from last year’s galls. See below. 
4. White oak? Gall q.flocci, in all probability identical with q. 
latia Fitch, which occurs on the white oak and is figured and described 
N. Y. Rep. II, §316. That gall is said to be “ the size of a hazelnut 
or walnut,” and the cells contained in it to be “ about the size of grains 
of wheat,” the length of the 9 % being given as .09 inch. The gall 
q. flocci varies from .20 to .40 inch in diameter, and is sometimes irreg¬ 
ularly elongated in the direction of the midrib of the leaf. The cells 
contained in it are much smaller than grains of wheat and more in 
proportion to the size of the fly produced from them. Rare. 
Gall-fly, C. q. flocci n. sp. 9 • Black. Head with the vertex glabrous and 
a little polished, and the face brownish and apparently pubescent; palpi 
brown; antennse § as long as the body, 13-jointed, the last joint more than ^ as 
long again as the penultimate, their basal ^ rufous and their terminal J dark 
brown. Thorax glabrous, somewhat polished, with two acute longitudinal strise 
converging on the scutel, and in one or two specimens with a faint medial 
stria also, obsolete before. Pleura sometimes entirely opaque subpubescent, 
sometimes with a moderately polished spot under the wings. Scutel finely 
rugose, not polished, its basal fovese large but shallow. Abdomen polished, 
viewed laterally as wide as long, the 2nd joint occupying about i its surface, 
and the dorsal edge of the 2nd joint forming a circular arc of about 25°. The 
front edge of the abdomen forms with the chord of this arc an angle of 100°, as 
