DRAGONFLIES OF DOUGLAS LAKE REGION. 



55 



DISCUSSION AND SUMMARY. 



The siibonlcr Anisopfera, which contains some of the largest and 

 most handsom(> (h'agonfiies, inchules the majority of s))ecies of Odonata 

 at present known from the Douglas Lake Kegion. (See Table 1;. Of 

 the forty-three species which have been collected in the region thirty 

 are Anisoptera. The nymphs of the Anisoptera occupy every type of 

 habitat suitable for Odonata from the stagnant l)og to the swiftly 

 flowing streams, and adults of this grouji were found Hying about 

 through the aspens a mile or more from water as well as some distance 

 from the shore over the lake. In general the adults of Anisoptera are 

 ver}' alert and so active on the wing that their cai)ture in many cases is 

 almost impossil)le. On the otlier hand, hoAvever, in certain places 

 which were infrequently visited, as Smith's Bog, the adults seemed less 

 shy and were easily captured as they hovered before one. 



TABLE 1.— SUMMARY OF SPECIES. 



In connection with the above table it is interesting to note that the 

 forty-three species listed represent a rather rich Odonata fauna for the 

 region studied, since Williamson^ records but eighty-three species 

 (forty-three Zygoptera and forty Anisoptera) from the entire state of 



<Rept. Ind. Dept. Geol. Nat. Resources, 1900, p, 233. 



