AMERICAN MIDLAND NATURALIST. 
NN 
Se S 
SS | n d IS | 
Ol | = NG 
Ne 
VANAPOISS 
| 
y 
PAL, 
x n 
du VINCENNES 
SN 
WR 
A X S OS SS 
i LBANY 
= 5 E25 
eee MN B® R77 
EVANSVILLER A x Sext 
CJ - y Y 21874 
Els Uncertain. 
Sketch map of Indiana showing the rapid dispersal of the cabbage butter- 
fly, Pontia rape. There were three introductions, one at Indianapolis, the 
other two at the points and from the directions indicated by the 
There is also an uncertain record of a fourth introduction at Evansville. 
Scale about 45 miles to the inch. Adapted from Scudder. 
