The Bulletin 31 
every day. Many individuals were observed to lay a single egg, and 
in one case one female was observed to lay an egg each day for three 
days in succession. Other individuals were observed to lay eggs on 
many separate, occasions. Four individuals were observed to lay two 
eggs in the same day, these individuals being under almost continuous 
observation from 3:30 a. m. to 11 p. m. 
From these observations it would seem safe to conclude that our 
daily egg records taken in the insectary would not be far from the con¬ 
ditions as they exist in the field; that is, that each female normally 
lays from one to at least four and perhaps more eggs each day from 
early May to late August, and perhaps more or less regularly from 
late August to late September. 
3 
