372 
Psyche 
[Vol. 93 
Figs. 1-5. Tergal gland reservoirs on abdominal segment 8 of Blattella spp.: Figs. 
1,2. B. germanica from Lakeland, Fla. Figs. 3, 4. B. asahinai from Lakeland and 
Okinawa, respectively. Figs. 5-8. F, males resulting from a cross between male 
asahinai and female germanica. 
and a male of the latter mated once with a female germanica. No 
offspring resulted from these 2 crosses. However, in the laboratory, 
B. asahinai males do cross readily with germanica females producing 
Fi offspring which, to date, have produced F 2 nymphs. Attempts to 
produce offspring from the opposite cross of germanica males and 
asahinai females, have been unsuccessful (Patterson, et al., 1986); 
these results suggest that the 2 species are distinct, but very closely 
related. 
One of the best diagnostic morphological characters for distin- 
guishing asahinai from germanica is the shape (KOH preparation) 
