OAK GALL-FLIES. Ill 
The following species of Cynipidae are not arranged systematically 
or by their modern genera, but so far as practicable by the species of 
oak on which they live. 
The oak-fig gall-fly. 
Cynips quercus-ficus Fitch. 
Order Hymenoptera; family Cynipid^e. 
Surrounding the twigs of white oaks in a dense cluster, resembling preserved figs 
packed in boxes, each molded to the shape of those pressing against its sides, hollow 
bladder-like galls of the pale dull yellow color of a faded oak leaf, each gall produc- 
ing a small black fly with the lower half of its head, its antennae, and legs pale dull 
yellow, its hind shanks dusky, and its abdomen beneath reddish-brown, its antennas 
with fifteen and in the female thirteen joints. Length .06, females .10, and to the 
end of their wings .14. (Fitch.) 
Galls which apparently belong to the above species were received 
June 10, 1882, from Miss Kath. Parsons, South Lancashire, Mass., who 
found them on the oak at Breakheart Hill, Saugus, Mass., and several 
of the gall-flies were bred from them between July 1 and July 13. 
Apparently the same kind of galls were found July 20, 1883, in Vir- 
ginia on Q. alba. From these issued, from August 16, 1883, to April 
21, 1884, numerous parasites, belonging to the genera Torymus, Ormy- 
rus, Decatoma, and a Oecidomyid. 
The Cynips, which are wingless, differ from those from Miss Parsons 
in that they were winged. They commenced to issue January 30, 18S4, 
and kept on issuing through the whole of February. 
From a few galls, received March 19, 1883, two specimens, also wing- 
less, issued February 9, 1884, and large numbers of wingless insects 
issued from a lot of galls collected by Mr. Koebele at Meredith Village, 
N. EL, in September, 1883, in the same month. Among these last was 
also one winged specimen of probably a differeut species. (Riley's un- 
published notes.) 
The oak-potato gall-fly. 
Cynips quercus-batatus Fitch. 
Order Hymenoptera; family Cynipid,e. 
A large, hard, uneven swelling, three-fourths of an inch thick and twice or thrice 
as loug, resembling a potato iu its shape, growing on white-oak twigs more distant 
from their ends than the oak-tumor; producing a small black gall-fly with the basal 
joints of its antennae and its legs dull pale yellow, its thighs and hind shanks black, 
and its middle shanks often dusky, the autennae in the female with thirteen joints, 
and the length of this sex .09. (Fitch.) 
The oak-bullet gall-fly. 
Callaspidia quercus- globulus Fitch aud Cynips oneratus Harris. 
Order Hymenoptera; family Cynipid.e. 
Smooth, globular galls the size of a bullet, growing singly, or two, three, or mere in 
a cluster, upon white-oak twigs, internally of a corky texture, each containing in its 
center a single worm, lying in an oval whitish shell resembling a little egg .15 in 
