385 



At 86 F. they hatch 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 



