PERCENT OVIPOSITING 
1962] 
Roth and Stay — Cockroaches 
173 
indicating renewed growth of the ovarian eggs as a result of the 
implants. 
Nauphoeta cinerea: The oocytes of virgins develop but unless 
mating occurs the oocytes in many females may degenerate before they 
reach ovulation size (fig. 5). Virgin females that ovulate do so in 31 
to 47 days (x— 3 5. 8 ±1.2 days; N=i7). Mating results in stirnu- 
Fig. 4. Effect of mating on oviposition. Solid circles — virgin females. 
Open circles — mated females. The curves for Byrsotria are based on 53 
mated and 121 virgin females. The curves for Rlaberus are based on IS 
mated and 36 virgin females. 
