350 ENTOMOLOGICAL NEWS. [Oct., ’08 
oak, as the infested tree harbors many thousands of the larvae 
and under its branches, the adults are found in swarms. Every 
leaf is infested, by from one to over one hundred, as high up as 
one can climb, certainly within ten feet of the top; but the in- 
festation at the highest point is not as extensive as that of the 
lower limbs. 
Cecidomyia (?) foliora n. sp.* 
Female.—Length, 1.95 to 2.55 mm. Antennae of 14 segments, length 
.95 to .99 mm.; the two basal segments light yellow, the others brown, 
thickly clothed with coarse brown hairs. Face bright orange-red; back 
of head with a fringe of dark brown setae. Mesonotum Van Dyke 
brown, with pale submedian lines, sparsely covered with fine setae. 
Sternum, pro and metapleura light brown, mesopleura dark brown. 
Abdomen with the five basal segments bright orange-red, thence gra- 
dually fading to a light yellow at the apex and lemon yellow on the 
protrusible ovipositor ;—within a few days the color of the ovipositor 
often darkens to an orange-red. Surface sparsely clothed with yellow 
setae. Legs light yellow, thickly covered with dark brown pubescence. 
Male.—Length, 1.20 to 1.65 mm. Antennae 1.50 to 1.65 mm. Scutel- 
lum orange-red; pleura pale brownish yellow, mesopleura marked 
with black. Abdomen orange-brown. 
The large bright orange-red abdomen and larger size of the 
females, make them quite conspicuous among the smaller males 
with their dull-colored abdomens. The color darkens within 
a few days after collecting, so that fresh material is necessary 
for identification ; the gall, however, is quite characteristic and 
cannot be mistaken. 
Described from nineteen specimens on eight pins, and from 
sixteen specimens mounted on six microscopic slides—eighteen 
male and seventeen female cotypes. These have ‘been deposited 
as follows: Two females and one male (one slide), and two 
females and three males (two pins) in the collection of the 
United States National Museum at Washington, D. C.; two 
females and one male (one slide), and two females and three 
males (two pins) in the collection of the New York State En- 
tomologist, Albany, N. Y.; the remainder—five females and 
five males (four slides), and four females and five males 
(four pins) in the collection of the Massachusetts Agricultural 
College. 
* Foliora from folium, leaf and ora, edge. 
