i 7 8 
Chaffer XVI 
The Habits of Anophelines 
Seasonal Prevalence. —We have already shewn how 
selective the Anophelinae are in their choice of breeding 
grounds ; consequently, if at any time, e.g., the dry 
season, a suitable breeding-ground does not exist, a 
particular species or genus of the Anophelinae may be 
absent. 
Thus we found in Nagpur (India, C.P.), during 
the dry season, in those places where shallow puddles 
had dried up, Mym. rossi was rare, but it abounded 
wherever puddles still remained. Where weedy lakes 
existed, Nyss. fuliginosus was common, elsewhere rare. 
Now these conditions are directly dependent on the 
rainy season, and where vast areas of weedy swamp are 
formed during the rains, then M. nigerrimus prevailed, 
to disappear when the swamps dried up. In temperate 
climes, the temperature is, no doubt, an important 
factor, the onset of the cold weather causing a general 
hibernation. 
The Hibernation of Anophelines 
i. Hibernation of the Adult Insects. —Annett 
and Dutton describe the finding of A. maculipennis 
during the winter in England in cellars, lumber- 
rooms, and other cold places, but not in stables where 
the temperature is higher. 
They observed that only females are found, and 
that these are always fertilized, and have the sper- 
matheca filled with spermatozoa. 
The adults of A. bifurcatus do not hibernate, 
or only rarely. 
