812 
ANNUAL REPORT OF NEW YORK 
OAK. LIMBS. 
addition to the galls from which they are bred, only a brief description 
will be required to enable one to recognize them. 
The Oak-ball parasite, Mncroglenes Querci-globuH, new species. 
This much resembles the gall-fly from which it is named, in its size and 
general appearance. It is black, with the basal joint of the antennas and 
the legs dull white, the thighs pale dull yellow, and the abdomen tinged 
with this last color along its under side. Length 0.15. 
The Oak-bcllet parasite,’ Pteromalus onerati, new species. 
This is smaller and more beautifully colored than the preceding, being 
of a brilliant coppery hue with a green reflection, and the under side of its 
abdomen golden yellow. Its legs are sulphur yellow and its antenmc dark 
brown with the first joint pale yellowish. It is 0.10 in length, with the 
females somewhat larger. I have also obtained this species from one of 
the galls of willow twigs. 
314. Oak-fib gall-plv, Cynips Qucrcus-ficvs, new species. 
Surrounding the twigs of white oaks in a dense cluster, resembling pre¬ 
served 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 loaf, each gall 
producing 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 antennae with fifteen and in the female thirteen 
joints. Length 0.06, females 0 10, and to the end of 
their wings 0.14. 
These galls are common upon the long slender shoots 
of young and thriftily growing white oaks. No com¬ 
parison occurs to me which wilPgive so correct an idea 
of their appearance, as that of preserved figs, as we sec 
them packed in boxes, each conforming to the shape of 
those surrounding and pressing against it on every side, 
and their outer surface showing irregular rounded eleva¬ 
tions with intervening hollows and fissures, resembling 
the convolutions of the brain or of the intestines. These 
masses of galls sometimes form a roundish ball, a half 
or three-fourths of an inch in diameter, with the twig 
passing through its center. But more frequently they 
extend along the twig three, six or more inches, in an 
uneven knobby mass. 
It is interesting to notice the first commencement and 
subsequent growth of these galls, which is as follows : 
The female pierces the bark with her sting and inserts 
a number of eggs at short distances from each other, sinking them 
