1911] Muttkowski, A Synonymical Note. 167 



ber of females of Ischnura verticalis, and also a few of Enallagma 

 calverti in the same place, the latter especially being quite conspicu- 

 ous. The two females captured were taken in copula after more than 

 an hour's diligent search. 



"I looked over the region very carefully for exuviae but could find 

 none of Coenagrion. The stems of plants, however, were in places 

 covered with exuviae of Leucorrhinia glacialis, which species was very 

 abundant, the earliest record as yet recorded for Milwaukee." 



The same spot was visited on June ist, when a few specimens 

 were captured, and on June 4th, when a large number were 

 gotten, among them at least 25 females. Under the latter date I 

 have the following: 



"June 4 : After all, it is the dense shore vegetation which the 

 species hunts and not so much that at the water's edge. In a little 

 wet spot, grown with grass about eighteen inches high, measuring 

 about twenty feet each way and closely surrounded by bushes, I found 

 the true haunt of the species. Here it sported in large numbers. It 

 also flew among the bushes, but not in such numbers, playing with 

 Ischnura and Nehellennia irene, and an occasional Enallagma hageni. 



"The most interesting feature is its perfect color protection. With 

 the sun shining on the grass and a slight wind moving the tips the 

 damsels were hardly discernible as they wove in and out in search for 

 food. The pale bluish green of the body, so marked when a cloud 

 covered the sun, disappeared entirely when the sun shone. It was 

 easier to get specimens by sweeping than to try to single them out. 

 Especially females were difficult to see. When in the net they would 

 usually sit quietly at the bottom and permit themselves to be trans- 

 ferred to the cyanide bottle without trouble." 



The venation of Cwnagrion rcsolutum varies considerably, 

 Thus of fifty specimens selected at random only 10 have typical 

 venation, that is, with vein M2 arising at the fifth postnodal in the 

 fore wings and at the fourth postnodal in the hind wings. The 

 remaining specimens show considerable fluctuation. To summar- 

 ize the results I give the following tabulations : 



