THE CANADIAN ENTOMOLOGIST 99 



the spruce. From that date to 18th July I took 12 more males 

 and 12 females. The captures of 18th July, a male and female, 

 were taken at the slough by the Forestry Station in the valley, 

 4,000 feet. The insects were all fresh and some damage occurred 

 to the papered specimens. New to Alberta list. 



34-132 Somatochlora semicircularis Selys. 



At the camp, Coliseum Mountain, in the evening 16th July, 

 I took a male at rest on a spruce. I immediately realized from 

 the general appearance that the insect was distinct from the other 

 somewhat similar species that I had been taking, i. e., franklini. 

 Not only was it larger and had a relatively greater wing spread, 

 but the abdomen, flattening to some extent in the process, at- 

 tained its greatest girth -at segments 6 and 7, and tapered again 

 to segment 10, while in franklini- the most robust segments are 

 7 and 8, and the reduction in 9 and 10 very slight. I have the 

 specimen in alcohol. Semicircularis has previously been recorded 

 from Banff and Laggan. 



35-132 Somatochlora septentrionalis Hagen. 



On the morning 18th July I had been collecting at the sloughs 

 each side of the trail at the Forestry Station. At noon I was 

 knee deep in slough when the Forestry Officer hailed me to come 

 up to lunch. Dripping water, I climbed through the fence, and 

 there in the enclosure I saw a Somatochlora flying in the shade 

 of a Jack pine. If I had refrained from taking it from laziness, 

 hunger or politeness, that fine male of septentrionalis would never 

 have been captured, and I should not have taken eight different 

 species of Somatochlora at Nordegg in nine days. The specimen 

 is in alcohol. New to Alberta lis^.* 



36-132 Somatochlora ivalshii Scudder. 



A single female was taken on July 15th on the top of Coli- 

 seum. It was mistaken for minor, which it resembles very closely 

 except in the form of the vulvar lamina. 



Beside the 15 species of dragonflies dealt with, or indirectly 



*A female evidently of this species, though differing from the published de- 

 scriptions and figures of septentrionalis in the form of the \'ulvar lamina was also 

 taken by Mr. Whitehouse on the top of Coliseum on July 12. — E. M. W. 



