PRELIMINARY NOTES ON THE ODONATA. 95 
G. spicatus Hagen. ‘Three captured, all females.’’ Wilson, Lake 
Phalen, ot. Paul) july 8, 1907. 
G. villosipes Selys. Taken in numbers with G. spicatus as above. 
G. cornutus Tough. On June 7, 1913, this rare and little known 
species was found transforming at a little kettle-hole near Mankato. A 
fresh female and a dozen exuviae were picked up from the floating 
sticks, algae, etc., at this time. On June 10th a male was obtained as it 
transformed. No mature adults were seen. So far as the writer knows 
the nymph has never been described. 
G. amnicola Walsh. Two males were captured at Mankato, June 
21, 1913, and August 14, 1914. One female taken at Red Wing, July 
17, 1907. Amnicola is very swift upon the wing and often keeps well 
to the middle of the stream. The nymph is still unknown. 
G. vastus Walsh. ‘Common everywhere; most of the specimens 
secured were males.” Wilson, Red Wing, July 17, 1907. Also taken at 
Prescott, Wisconsin, and Lansing, Iowa. 
G. crassus Hagen. “A single female secured in company with G. 
vastus.’ Wilson, Red Wing, July 17, 1907. 
Genus Aeshna Fabricius. 
Ae. terrupta lineata Walker. A male of this species was taken 
at Lake Madison, August 9, 1914, and a female at Mankato, June 19, 
1913. Walker states that Aeshna interrupta lineata is the most char- 
acteristic dragon-fly of the Canadian Zone and that it also ranges as 
far south as Missouri. 
Ae. verticalis Hagen. (Ae. juncea verticalis (Hagen), of Wil- 
son’s List.) Taken at Lake Phelan, St. Paul, July 8, and at Hastings, 
July 12, 1907. 
Ae. constricta Say. A pair in copulation was captured in an open, 
pastured woodland along the Minnesota River near Mankato. The in- 
sects hung quite motionless from the lower branches of the oaks, al- 
lowing the net to approach them without seeming to heed it. Three 
females were taken along a wooded roadside which skirts Lake Madi- 
son, most of them as they clung to the under sides of leaves or twigs, 
devouring their prey. All of the above females were heterochromatic. 
This seems to be our commonest species of Aeshna. 
Genus Anax Leach. 
A. junius, Drury. Undoubtedly this large dragon-fly is to be found 
very commonly over the entire state from April to November. Speci- 
mens in the writer’s collection represent three localities—Alden, Man- 
