1974 ] Smith — Life History of Abedus herberti 277 
Figure 2. Individual molt records for 31 laboratory reared nymphs of 
A. herberti. Open circles indicate molts. Closed circles indicate the death 
of that nymph. 
coris macronyx (= Abedus indentatus Haldeman) drop off and are 
replaced (presumably by the original or another female) by others 
as late as the sixth or eighth day of incubation, but in every instance 
I observed, nonviable eggs were retained in the nidus through incu- 
bation and hatching of the viable eggs. Incubation periods from lay- 
ing of the first egg to hatching of the first ranged from 21 to 23 
days in the laboratory. Voelker (1968) has shown developmental 
time for eggs of Limnogeton fieberi to be directly correlated with 
temperature, the optimal temperature being 32-33 C. He reports an 
8 day development time at optimal temperatures, which seems to be 
more in agreement with the results obtained by the majority of other 
workers for belostomatids (Torre Bueno 1906, Harvey 1906, Hun- 
gerford 1925, and Tawfik 1969). Menke (i960) found the incu- 
bation time for A. dilatatus to exceed 30 days in the laboratory, but 
we both (Menke, personal communication) suspect that development 
