-102 Psyche [June 
Fig. 7. Changes in water content, with age, in the oothecae of Lophohlatta 
brevis. Arrows indicate days when eggs hatched. 
The first adults appeared in the culture in 84 to 85 days after the 
eggs hatched. After the first ootheca ) oviposition occurs about every 
40 to 44 days. If the ootheca is removed manually from the female 
prematurely, a new ootheca is formed much earlier than it would 
be if the eggs were allowed to remain attached to the female until 
hatching. The younger the age of the ootheca when detached from 
the female, the longer it takes to form a new egg case (Fig. 8). 
Recently formed oothecae that are removed from the female lose 
water rapidly and the egg case collapses. These results are similar 
to those obtained with Blattella germanica (L.) and Blattella vaga 
(Roth and Stay, 1962) and show that the presence of an ootheca in 
