2 'University of Michigan 



fauna would be large, a supposition corroborated both as re- 

 gards species and individuals. 



The odonate habitats may be divided into three groups, the 

 Manistique River, the small streams flowing into it, and the 

 small lakes and ponds. Two habitats common in northern 

 Michigan were lacking, viz., clear, rapid streams, and rocky 

 lake shores, factors which undoubtedly excluded many species 

 from the region. 



The imagoes were found widely distributed, tho many spe- 

 cies, exhibited marked preferences for certain sets of condi- 

 tions. Caloptcryx acquahilis was found only along the river, 

 usually flying over the water, Caloptcryx niaciilata in smaller 

 numbers was frequently associated with it, but was more often 

 found in shady, rather open woods in company with species of 

 Testes. Libcllula qnadrhnacidata preferred high, dry, open 

 country, while Libcllula piilchclla was only seen flying over the 

 waters of an oxbow lake. The various species of Enallagma 

 ',vere found among the reeds and grasses on the shores of 

 small lakes and ponds. The species of Aeschninae were most 

 often seen in open woods, as was true of the single species of 

 Cordulegaster. The species of Sympetrum were widely dis- 

 tributed in open woods, meadows, ponds, small streams — any- 

 where that there was an abundance of sunlight. All of the 

 species of Leucorhinia save L. intacta were taken at lakes and 

 ponds, while it frequented the edges of woods in sunny open- 

 ings. The various species of Somatochlora were all found along 

 old logging roads cut thru heavy w^oods. 



In all, specimens of fifty-one species were secured, of which 

 thirty-three belong to the suborder Anisoptera and eighteen to 

 the suborder Zygoptera. One new species was taken, and de- 

 scribed by Mr. Kennedy as Somatochlora walkcri. All the 

 specimens are in the Museum of Zoology at Ann Arbor. 



