Occasional Papers of the Museum of Zoology 3 



in the Museum of Zoolog^^ of the University of Michigan, 

 with the exception of a few specimens of a number of the 

 species determined by Rehn and Hebard, which are in the 

 collection of the Academy of Natural Sciences of Philadelphia. 



General Description of the Region 



The area studied lies in the western part of Berrien County, 

 in the extreme southwestern corner of the state. It com- 

 prises a portion of the sand dune area along the shore of 

 Lake Michigan and certain fairly typical areas on the clay 

 and loam soils of the inland region. The field work was done 

 chiefly upon and in the vicinity of the Warren Woods and 

 Warren Dunes, which Logether form a state preserve under 

 the E. K. Warren Foundation. Collections were also made 

 at several other points in the western part of the county, 

 notably at New Buffalo, Three Oaks, Lakeside, Harbert, and 

 Stevensville. 



THE SAND-DUNE REGION 



In southwestern Berrien County the dune region extends 

 along the shore of Lake Michigan as a well-developed belt of 

 varying breadth from New Buffalo north to Stevensville, at 

 which point it nearly disappears. It was studied chiefly in 

 the region between Sawyer and Bridgman, where it is from 

 half a mile to nearly a mile wide. The Warren Dune Preserve 

 is situated at the point where the dunes attain their greatest 

 development, and includes some of the largest dunes on the 

 lake. It lies nearly midway between Bridgman and Sawyer. 

 The lake frontage of the preserve is slightly over a mile, and 

 it covers nearly the entire width of the dune area at this point. 

 Much of the field work was done in the Warren Preserve, 

 but since it was extended over the entire dune area between 



