385 
At 86° F. they Fateh in thirty-six hours, but at 68° F. 
they will not hatch at all. 
Larva. —(p. 81). This stage lasts about a week. 
Nymph .—This stage lasts thirty-six hours. 
Imago.—In the absence of water , in the tropics, it 
lives only three to four days. It is most active at 86° F., 
and is very sluggish at 68° F., and at 58° F., rarely 
bites. 
The adults may be kept alive for nearly six months. 
BB 
