74 
Psyche 
[December 
lation of the corpora allata so that the oocytes develop rapidly (fig. 5) 
and oviposition occurs in 18 to 21 days (x= 1 8.9=1=0.40 ; N=8). 
Copulation is completed in 17 to 30 minutes (x=20.4±0.8i min. ; 
N=i 7). Of 22 females kept with males continuously, 19 mated 5 
days after emergence; the other 3 mated after 6, 8, and 10 days respec- 
tively. 
44 r 
4.0; 
3.6 7 
3.2 7 
2.87 
2.4; 
2D 7 
1.6 7 
1.2 7 
0.8 o° 
0.4; 
0.0 p- 
0 = Oocytes, virgin females 
• = Oocytes, mated females 
■ = Degenerating oocytes, virgin females 
o 
o 00 
o 
■ I 
a. b I 
8 8 ° Q ° o B ° B o o g o B o a , 
Opo 
o o 
o - o 
• o o Q ^00 o 
° ° ffo * o 
° otf°o OB OOO 
„ 98 O 0 O o 
8° §& ■ 
8 ° 0° oC „ 
00 : 8 o 0 
o ° 0 O o 
o 00# ° O 0 
Q° 0 o ° 
opo 
o O 
°o>° O o 
■ I ■« 
O O 
o 
o o 
J-J-i- 1 1 I I I I I I 
1 1 1 1 1 1 
Nauphoeta cinerea 
I 1 1 1 . I 
5 10 15 20 25 30 35 40 45 50 55 
AGE OF FEMALE (DAYS) 
Fig. 5. Growth of oocytes in mated and virgin females of Nauphoeta 
cinerea. Each point represents one female. Except for 2 individuals mated 
at 8 and 10 days of age, all others were mated when 5 days old. 
In a series of experiments performed at Harvard University, tem- 
perature was uncontrolled but usually higher than 24 0 to 25 0 C. ; the 
insects were maintained on Purina Laboratory Chow. Both virgin 
and mated females oviposited earlier than in the above experiment but 
virgin females still oviposited later (24 to 35 days) than mated indi- 
