38 Bulletin Wisconsin Natural History Society. [Vol. 9, Nos. 1-2. 



■Aeschna interrupta Walker. 



North. Hudson. St. Croix Co., July 6-12, one female. 



This was taken at the bluffs of Lower St. Croix lake, where 

 I watched it playing for some time with Hpicordulia princeps. 



*Aeschna lineata Walker. 



Maiden Rock, Pierce Co., Aug. 4-11, one male. Hastings, Minn., 

 July 12, one female. 



The male was taken in the wild rice in the bottoms left by Lake 

 Pepin, where it associated with Anax Junius and Aeschna con- 

 stricta. The female I found in the depot at Hastings, Minn., 

 while en route to Prescott. It was lying on the floor, totally 

 spent but still alive. It was fortunate that the specimen had 

 escaped being mashed by the feet of the various people crowding 

 the station. 

 Aeschna constricta Say. 



Maiden Rock, Pierce Co., July 27-Aug. 4, one male. 



CORDUUIN.£. 



Epicordulia princeps (Hagen). 



North Hudson. St. Croix Co., July 6-12, nine males. 



Though this species was extremely wary, I succeeded in 

 obtaining nine males. I looked in vain for females. Such males 

 that I caught were betrayed by their curiosity. They would fly 

 very close and, notwithstanding my repeated attempts to get them 

 into the net, return after circling over a short patrol of about 75 

 feet length. This flight back and forth was kept up by them for 

 an appreciable length of time, after which they would dodge over 

 the bluff with a speed that I was unable to follow with the eye. 

 I did not see any of them enter the woods nearby; all stayed 

 in the open strip along the bluff, refusing to interrupt their play 

 and preying even while I disturbed them. In this they acted 

 differently from Leucorrhinia glacialis, which frequented the 

 same locality and would dodge into the woods upon my approach, 

 to be lost in the shadows.^ 



Although I watched them carefully. I did not see whether 

 they rested. Only on the nth day of July, when we collected on 

 the. shores of the Willow river pond, did I observe them resting 

 on the tips of the various Potamogeton (pondweed) which were 

 just then appearing above the water surface. They were in less 



