14 University of Michigan 



PLATE IV 



Figures i8 and ig. C. minimum Miiller. Greenhouse at Norfolk 

 Downs, Massachusetts. G. H. Clapp. 



Figures 20 and 21. C. exiguum var. ? Harbert, Berrien County, 

 Michigan. Museum of Zoology No. 13326. 



Figure 22. C. exiguum var.? Harbert, Berrien County, Michigan. 

 Museum of Zoology No. I333i- 



