1985] 
Pet try & Tarter — Baetisca Carolina 
365 
Body Length, mm 
Figure 5. Fecundity-length regression analysis and the coefficient of correlation 
for adult females of Baetisca Carolina, Panther Creek, Nicholas County, West 
Virginia. 
since small numbers of exuviae were found. Even though these data 
can be adversely affected by environmental conditions such as rain, 
the general emergence pattern is supported by growth data of the 
nymphs. The two peak emergence periods corresponded to the two 
growth periods exhibited by the nymphal population (Figure 2). 
Rearing and Emergence. Last instar B. Carolina nymphs were 
reared in the laboratory beginning in late April. Only one subimago, 
a female, emerged in the laboratory. This occurred before 1:00 p.m. 
on May 6, and the subimago died before transforming into an 
imago. 
Subimagos collected in the field successfully completed the trans- 
formation to the imaginal stage in the laboratory. Duration of the 
subimaginal stage of B. Carolina was recorded for two individuals at 
