56 



PAPERS ON ZOOLOGY OF MICHIGAN. 



Indiana and Muttkowski^ records four hundred ninety-four species 

 and subspecies from North America. 



The data gathered, coming from varied habitats as they do, make 

 possible an ecological study of the nymphs. These habitat relations 

 have been incorporated in Table 2. 



TABLE 2— HABITAT PREFERENCES OF THE NYMPHS COLLECTED. 



It is to be noted that this table lacks data for twelve species which 

 are known from the Douglas Lake Region. 



Table 2 shows rather well the vertical distribution within the habitats 

 and the habitat preferences. In general it may be said that the Aesh- 



sBull. Public Mus. Milwaukee, I. 1910-11, p. 6. 



