42 
[April 
4. Rounded^ warty^ sometimes very large gall^ smooth on the out¬ 
side^ occurring on the roots of roses and containing numerous cells^ 
with an intervening pithy matter. This is the gall described by Dr. 
Harris (1. c. p. 549), as the gall of Cynips semipicea. Harris. But 
Dr. Harris’s description of this insect does not refer to the true origi¬ 
nator of the gall, Rhodites radicum n. sp. (described below). Dr. 
Harris says : they resemble closely the dark varieties of G. dichlocerus 
in color and in the little furrows of the thorax, hut their legs are rather 
paler and they do not measure more than one-tenth of an inch in 
lengthy R. radicum is much larger than one-tenth, and its legs in¬ 
stead of being paler, are on the contrary conspicuous among those of 
the other Rhodites by the intensity of their brownish-red color. Dr. 
Harris’s description probably refers to a parasite (perhaps an Aidax). 
Specimens of this gall have been communicated to me by Mr. Nor¬ 
ton and Mr. Akhurst. Eurytoma., Ccdlimome., Ormyrus and an Eu- 
pelmus., with rudimental wings, have also been reared from it. 
5. Roundedsmooth., abrupt swellings of the branches. The out¬ 
side of this gall (form, color and skin), is not like the preceding. 
Some of them remind by their appearance the galls of Eiastrophus 
nebulosus on the blackberry. They are easily distinguished from R. 
dichlocerus (No. 2), as they rise abruptly from the branch, whereas the 
other gall is gradually tapering at both ends. The substance of this 
gall is rather soft, corky, with numerous cells. The form is more or 
less oblong, sometimes almost round ) my specimens measure from 
three-fourths of an inch to an inch and a quarter in length; the 
largest is a little more than three-fourths of an ioch broad. 
Mr. Norton, to whom I owe -the communication of this gall, reared 
from it a very large number of specimens of an Aulax. Until further 
proof I cannot, however, consider this insect as the originator of the 
gall. , I am also doubtful, whether several specimens of Rhodites (de¬ 
scribed below as R. ignota n. sp.) in Mr. Norton’s collection, marked 
as being obtained from “ smooth rose-galls,’’ belong here, as precisely 
similar specimens were reared from another gall (comp. gall. No. 7). 
Aulax pirata n. si3.—Black, with reddish-yellow feet and antennae ) base of 
coxae black ; thorax pubescent; wings hyaline; length 0.08, Q 0.1. 
Head black, mandibles somewhat reddish; face finely pubescent, a longitu¬ 
dinal protuberance between the mouth and the antennae; the interval between 
it and the eyes is finely aciculated, the scratches converging more or less to- 
