PRAIRIE SPOTTED SKUNK 
357 
State University Museum also was examined. It is from Wall 
Lake, Iowa, December 2, 1908, collected by John A. Spurrell. 
Dr. C. B. Cory of the Field Museum, Chicago, kindly sent for 
examination and comparison three skins and skulls of mammals 
of this genus; two are of Spilogale interrupta and one of 8. pu- 
torius which is reported to come into southern Illinois. The 
latter specimen, 8. putorius, is a topotype and differs markedly 
from all our Iowa specimens examined, especially in the amount 
of white at the end of the tail, and to a lesser degree in cranial 
characters. 
I find at present no evidence of intergradation between 8pilo- 
gale interrupt a and 8. putorius in Iowa. That this may occur 
in western or southern Illinois is not unlikely. 
The present paper endeavors simply to extend the known dis- 
tribution of 8. interrupta over* eastern and southeastern Iowa, 
in fact making the known distribution of this species state wide. 
