352 ENTOMOLOGICAL NEWS. [Oct., ’08 
more or less reddish. Within this roll, the larva continues to feed, 
extending the roll as it grows. Occasionally, a young larva feeds tor 
a time in a circle on the exposed surface of the leaf, causing it to become 
reddish and wrinkled. By May 22, nearly all the leaves near the ground 
show the rolls, which in some cases, nearly encircle the leaf, while in 
others, they may be about one-quarter of an inch long. In 92ne roll, 
an inch long, twenty-five larvae were found; while in others, only a 
few were present. As a rule, the longer the roll, the fewer insects 
they contain relatively. The insects remain in the larval stage through 
the summer, becoming full grown by the last of September or first of 
October, when all but those parasitized descend into the ground aud 
pupate to pass the winter. In exceptional cases, perfect larvae are not 
able to escape from the roll in the fall, and so pass the winter in the 
gall, emerging at the usual time in the spring through cracks or punc- 
tures in the drier rolls. 
Parasites—This gallfly is attacked by a chalcid egg parasite which 
appears at the same time in swarms almost as large as those of the host. 
The female chalcid walks around among the Cecidomyia eggs touching 
them rapidly with her antennae and stopping every now and then to 
insert her ovipositor and lay an egg in one of the host eggs, but neg- 
lects those surrounding it. 
A species of mite was also found to be very abundant under and 
on the tree, and though it was not seen attacking eggs or larva, con- 
ditions were such that it may be considered as possibly a parasite. 
EXPLANATION OF PLATE XIV. 
1. Lower side of leaf showing galls, half natural size. 
2. First stage of larva, not over six days old; just beginning to form 
galls on oak leaves. X 190. 
3. Wing of C. foliora. X 25. 
4. Segment of antenna of male; greatly enlarged. 
5. “Wishbone” of full grown larva; greatly enlarged. 
6. Dorsal view of head of full grown larva; greatly enlarged. 
Mosgurtors INvADE Crty.—Swarm Comes to Town and Plays Havoc 
Before Storm.—Just before the heavy storm last nignt a large swarm 
of mosquitoes flew into the city and caused a great deal of annoyance 
and plenty of work for physicians in the hospitals of the northeast 
section. In about fifteen minutes after the swarm struck the city the 
hospitals began to receive patients with their faces and hands so badly 
swollen that it was necessary in some cases to lance them to draw out 
the sting of the bite. On Girard Avenue, east of Belgrade Street, the 
pests stripped all the trees of their leaves. After they had passed the 
trees looked as though autumn had come.—Philadelphia Press, July 
24, 1908. [!!!] 
