THE VICTORIAN NATURALIST. 101 
second pairs of legs. A pair of what appear to be eyes, situated in 
a, furrow on each side of the mouth, can be seen by the microscope. 
The antenne are minute, and placed in front of the first pair of 
legs. 
Tr haye found colonies of young in May and October. They were 
congregrated in enormous numbers in the parent Gall, round the 
body of the insect. They were very active, and ran fice quickly. 
None were bigger than a pin’s head. Examined under the microscope 
they were seen to be of an oval shape. The tarsi of each leg 
terminating in two short filaments. The antenne setaceous, and 
terminating in four filaments, two long, and two short. The body 
divided into eleven segments, terminating in two long filamentous 
sete. Round the margin of the insects at regular intervals, were 
short outstanding hairs forming a fringe. 
Opisthoscelis sp. I shall only remark upon one species of this 
genus. The Galls I have found, both male and female, on the 
leaves of young Eucalypts. They are much smaller than the 
Brachyscelis. The female galls are spherical in shape, about the 
size of a pea; viz., 10 lines in length, and 10 broad. The Galls 
form on the under side of the leaves, and the mouth or orifice opens 
on the upper. 
The Galls of the males form on the same leaves: they are much 
smaller than the females and conical in shape. The male insect is 
a good deal like the above mentioned species of Brachyscelis, but is 
thicker in the body, has shorter anal sete, and its body, legs, and 
antenne, are covered with short hairs. 
Cutting the female Gall through, shows a very anomalous insect, 
appearing as a small mass of jelly, covered with a white dust. It is 
five lines long, and four broad, and about three lines through from 
dorsal to ventral side. The posterior pair of legs are well developed 
and moye actively. The first and second pairs are absent. The 
whole of the fore part of the insect is permanently glued to the 
inside of the gall. 
I have found young appearing in October and November. They 
are similar in appearance to those of the young of the genus 
Brachyscelis, excepting in not having a fringe of hairs round the 
side, and being scarlet in colour. On making their exit from the 
parent Galls, they ascend the branches to the young, fresh shoots at the 
extreme tips: there they affix themselves by their rostrum, and 
form galls, gradually increasing in size, and lose their anal sete 
as well as their former activity. 
I have frequently found parasitical grubs of microscopical size, 
alive in different species of galls, and in November I noticed sey eral 
minute Hymenopterous flies ‘allied to the genus Chalczs, just leaving 
the galls of the species of Opisthoscelis above mentioned. 
I have prepared slides for the microscope of the above mentioned 
