Number ii8 Jui.y 6, 1922 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



HEMIPTERA FROM BERRIEN COUNTY, MICHIGAN^ 



Bv Roland F. Hussey 



The region about the southern end of Lake Michigan holds a 

 pecuhar interest for students of the distribution of animals and 

 of plants. Zoologists and botanists ahke find there a few forms 

 which are characteristic of the southern states, or even of the 

 coastal region of the Atlantic seaboard. The phytogeographic 

 evidence indicates that the plants which fall in this class came 

 in from the Atlantic coast during one of the later interglacial 

 periods, and that the route which they followed led up the 

 valleys of the Hudson and the Mohawk rivers to the fore- 

 runner of Lake Erie, around the southern shore of the lake 

 and up the eastern side of Michigan to the "Thumb" region, 

 and westward across the state through the valleys now occu- 

 pied by the Saginaw and Grand rivers.^ But when the ani- 



1 Contribution from the Entomological Laboratory of the Bussey 

 Institution, Harvard University, No. 193. 



2 I am indebted to Mr. Donald C. Peattie, of Harvard University, 

 for this information, which was given in an address before the New 



