1979] 
Chaffee & Tarter — Baetisca bajkovi 
57 
> 
O 
June 
“ July 
OL 
30 r 
Aug 
0 
30r- 
- Sept 
oE 
2 ° r- 
- Oct 
0 
10 
0 
20 
£ Nov 
- Dec 
oL 
10 r 
ot Jan 
15 r 
t Feb 
oL 
15 f 
oL 
Mar 
J L 
ot A ? r 
isr 
May 
1 
0 L 
(32) 
(36) 
(57) 
(49) 
( 21 ) 
(42) 
(18) 
J L 
(26) 
(33) 
(25) 
(35) 
I 
10 
I 
11 
body LENGTH, mm 
Figure 1. Length-frequency histograms showing monthly distributions of B bai- 
77 T h BeeC f F0 ; k ; f TwelVe P°' e Creek - Wa y^ County, West Virginia, 
1976-77. Number of md.v.duals collected each month is given in parentheses. 
the diet. The diatoms most numerous in the foreguts and in 
monthly occurrence, were Navicula spp„ Cymbella sp„ Diatoma 
sp„ and Synedra sp. Navicula was the only diatom present in the 
oregut contents every month. The recognizable filamentous algae 
ound in small amounts were Cladophora sp., Spirogyra sp„ and 
Ulot hr lx sp. Mineral particles were always plentiful, but it is not 
