702 Major Neville Manders on 
marked like Nos. 4, 11 in Plate XXXIV, 1.e. Gnoma; the 
striz in most, however, not being quite so pronounced as 
in No. 4. 
Only four (all females) bore at all heavy markings as in 
No. 7 (this I should call C. guoma), and in these the color- 
ation of the striz was of a light yellowish shade, which 
shade, he says, appears to prevail in the majority of dry- 
weather females. These sixty insects would appear to be 
all C. gnoma. I have written to ask him to capture this 
year several hundreds if possible, as I think the numbers 
too few for a correct estimate. | 
A large number of larvee were kept in a glass jar and 
the atmosphere was kept saturated with moisture, the 
temperature being about 80° F.; this was also the tempera- 
ture of the outside air at the time. A considerable 
number of the pupz promptly rotted, and the amount 
of moisture was necessarily reduced. The left-hand series 
in the photograph shows the result; they all emerged 
between the 5th and 12th of December and are mostly 
females. In future experiments I should employ wet and 
dry bulb thermometers. These five were the only ones that 
survived. 
A considerable number of pupz, the larve of which 
were reared under normal conditions, were kept at a 
temperature between 55° F. and 65° F. by means of ice; 
the result is shown in the second row of the photograph. 
All emerged between the 9th and 17th of December. The 
mean temperature of Colombo is 75° F. and the lowest 
ever recorded is 68° F., the pupz were therefore 10° to 
20° below normal. It was distinctly difficult to keep 
the pupze down even to this temperature, but in future, 
now that there is a cold storage depdt in Colombo, I 
would try and make use of it for experimental purposes. 
The attempt to keep pupz in an abnormally hot dry 
atmosphere failed—the pupe all dried up. 
Finally, certain unfortunate larvae were in an anhydrous 
atmosphere, a large glass jar with coral unslaked lime, 
It was exceedingly difficult to keep them alive, as they, 
the food-plant, and even the eggs shrivelled up. However, 
by reducing the amount of lime five specimens survived 
and are shown in column 3; they hatched between 11th 
and 13th December. 
A wet and dry bulb thermometer would be usefully 
employed in this experiment also, _ 
