Table 1. Dates of first and last observed flights of two common multivoltine butterflies in lowland north-central California, 
based on standardized methodology and level of effort. 
Pieris rapae Papilio zelicaon 
1984] 
Shapiro — Pieris rapae 
163 
3 « 
W £ 
u. 
03 03 
O J 
c 
(U 
B 
03 
Ui 
o 
03 
CZJ w 
Ji Cfl 
« E 
Q 
X X X X X 
22 JTj Os vn 
» ^ ^ 
OO cs! O — 
<N 
J ^ " , «n — * m 
— <Npr) — ._;<N 
<N O £ 
x 'x X 'x * X -a 
" h O' 
<N — (N 
Xb?3X3’3XXv<^‘“’~ 
s O « 'O Vl 
^ (N ' (N 
oc r- o 
nnTfirivOhooO'O — M ri ^ 
i^t^r~r^i^r^t^i^-ooocoooooo 
0'0'0'0'0>0\^0'0'0'0'0'0' 
J3 
1 1 
03 _ 
8 c 
c CS 
3 
o c 
u « 
o '5b 
— o 
O C 
0 0 
iS 
73 o3 
u T3 
03 60 
^ C 
£ J 
compared to near-coastal populations. 
