2 University of Michigan 



mals are considered the case is much less simple. In certain 

 cases we find a distribution which parallels that of the "coastal 

 plain" plants, but often the forms in the Lake Michigan region 

 have become sufficiently distinct from their relatives on the 

 Atlantic coast to warrant their separation into geographical 

 races : witness the Orthoperan species Trimerotropis maritima 

 and Paroxya clavuliger, which are represented in the Lake 

 Michigan region by T. m. interior and P. c. hoosieri, respec- 

 tively. A large part of the southern element in the fauna of 

 this region has undoubtedly followed up the Mississippi Valley. 

 Though botanical investigations have been carried on here 

 for nearly half a century, faunistic work has largely been 

 neglected. However, the Michigan Biological Survey has 

 recently begun a study of the animals of Berrien County, 

 which lies within this interesting region. In connection with 

 this survey in Berrien County, I was asked to make collec- 

 tions of Hemiptera, and the present report is based on held 

 work done during the summers of 1919 and 1920. The actual 

 dates covered by my collections fall between June 19 and July 

 5, 1919, August 30 and September 3, 1919, and July 3 and 

 July 28, 1920. The specimens secured are deposited in the 

 Museum of Zoology of the University of Michigan. 



Berrien County is located in tiie extreme southwestern part 

 of the Southern Peninsula of Michigan, bordered on the west 

 by Lake Michigan and on the south by Indiana. The region 

 in which my collections were made comprises a strip about 

 twenty miles long and three miles wide, extending parallel to 

 the lake shore from New Buffalo, near the state line, north- 

 east to a series of small, marshy lakes near Stevensville, which 



England Botanical Club. May 6, 1921. Mr. Peattie discusses the 

 coastal plain element in the flora at the head of Lake Michigan in a 

 paper which is appearing in Rhodora, Vol. xxiv, 1922. 



