
159 
CALLIRHYTIS SEMICARPIFOLILE, 
CAMERON. 
Platesy I tio: 2, b,c, 
Reference ; —Cameron in litt, 
Classification :—Order, HYMENOPTERA. 
Tree attacked:—Quercus semicarpitfolia (the Kharshu 
Oak). 
Description. 
The Jarva is a minute white grub. (See PI. VII, fig. 3, a.) 
The pupa is white and the parts of the perfect insect are 
seen nearly free, each covered in a very delicate skin. It is 
found simply lying in its cell and is unenclosed in any kind of 
silky cocoon. As the insect matures the head becomes black, 
as also the upper surface of the thorax and abdomen, the latter 
becoming pale yellow on the under surface. 
Imago.—Head and antenne black; upper parts of thorax 
and abdomen black, sides and ventral surface dark amber- 
yellow; legs amber-yellow and moderately long; body is ovate- 
elliptical and blunt at posterior end. Wings four in number 
14 times length of body. Expanse of wings ;%th inch. PI. VII, 
fig. 3, b, shows the pupa and fig. 3, c, the imago of this insect, 
Life History, 
This insect was discovered by the writer in acorns on July 
5th. It proves to be new to science, All stages of the insect 
from full-grown larve to fully mature imagos, and also pupae, 
were present in the seeds. It may thus be taken that the 
fly reaches its full development during the first fortnight in July 
or just before the burst of the monsoon. 
The pupal stage is evidently a very short one. 
As far as present observation goes the species would appear 
to require a cold climate, since the elevation at which this oak 
grows is from 8,500 to 10,000 feet. 
The tree flowers in July-August, and it would appear 
probable that the flies lay their eggs either in the female flowers 
ot on the twigs adjacent to them, as the insect’s life from the 
