CONSTITUTION AND DEVELOPMENT OF TERMITES, 277 
good for the interval from November to the middle of May; 
while the opposite condition exists in the second half of 
-May, in June, September, and October. Consequently 
oviposition remains suspended during winter and a large 
part of the summer. At the end of October many eggs 
are still to be found in the gastrula stage, and it follows 
from the preceding statements that they remain thus during 
the winter; but at the same month a certain number can be 
found in an advanced stage of development. From this, and 
from the fact that many new-born larve are to be found in 
that month, I can confidently state that the eggs laid in 
September (and perhaps in the early part of October) develop 
immediately without need of hybernation.! 
At all seasons, except from about April to the middle of June, 
larvee, with the features of being newly hatched, are to be found 
in the nests of Calotermes. The larve which are born in 
the second half of October make no progress in development 
until the following April. 
Larve in stages of development which succeed those with 
the characters of recent hatching are to be found at all times 
of the year. 
Nymphs are to be found in every nest during nearly all the 
year, being absent at most only in August and September. 
The perfect insects develop from July to October, a few 
_stragglers appearing in the spring. Their swarming is quite 
different from that observed in bees, and they leave the nest a 
few days after they become black. [As development is not 
simultaneous, they swarm in small groups of at most thirty 
examples, and occasionally singly or in pairs. A colony may 
therefore swarm, so to speak, ten or twelve times in all, from 
July to October. ] 
This fact explains the existence in many nests of a few 
winged examples still at the end of the swarming season, 
that is in October. 
1 TI must admit that there is a certain gap in my observations in the 
summer months, when I am unable to reside at Catania owing to the exces- 
sive heat. 
VOL, 39, PART 3.—NEW SER, T 
