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Psyche 
[December 
viduals (15 to 18 days). The difference in rate of oocyte development 
in virgin and mated females is shown in figure 6. The oocytes of 
starved females that have mated develop at the same rate as fed mated 
females (fig. 6). 
Of 17 virgin females that oviposited, 10 retracted the ootheca com- 
pletely into the uterus; several of these females aborted the egg cases 
several days after oviposition. Four females partly retracted the egg 
cases so that some of the eggs remained protruding from the abdomen ; 
three dropped the egg cases while or after they were formed without 
retracting them. In most virgin females (including those that retract 
the ootheca normally) some mature oocytes remain in the ovaries. 
Fig. 7. Ovarian cycle (first and second ovipositions) in Leucophaea 
maderae. The points for the oocytes of unmated females (open circles) are 
means of 5 to 21 individuals (N = 349). For the first preoviposition period, 
females were mated (solid circles) when 16 days old and each point repre- 
sents 1 individual. Each point for the gestation and post parturition periods 
represents one individual. 
Leucophaea maderae: At emergence the oocytes of Leucophaea are 
o.97d=o.oi mm. (N = io). Mature oocytes at ovulation are 5 - 56 ± 
0.12 mm. (N=20: 10 mated and 10 virgin females). The new basal 
oocyte at oviposition is o.66±o.oi mm. (N=n) and at parturition 
i.05d=0.0i mm. (N=4). Under our conditions gestation lasted 91.8 
