NO. 1692. DRAG0NFLIE8 OF THE MISSISSIPPI VALLEY— WILSON. 555 



they are omitted it is to be understood that the conditions were those 

 usually found along the river — high and heavily wooded banks with 

 a cleared area at the immediate margin of the river, more or less 

 covered with tall grass and weeds. 



LIST OF SPECIES. 

 I. LAKE AMELIA, MINNEAPOLIS, MINNESOTA, JULY 6 AND 7. 



This is a small lake west of Minneapolis which serves as one of the 

 feeders of the Minnehaha River. It is surrounded by high and dry 

 banks which are entirely cleared, leaving only here and there a bush 

 or tree. The immediate shores are covered with a dense growth of 

 grass and weeds, back of which are cultivated fields. 



1. ANAX JUNIUS (Drury). 



Common around the shore and inland half a mile or so ; a very strong flier 

 and hard to capture except when mating. 



2. TETRAGONEURIA SPINIGERA (Selys). 



Common flying along the shore and very close to it inland; frequently 

 alights and can then be easily captured. 



3. LIBELLULA PULCHELLA Drury. 



Common not merely around the lake but far inland over the potato and 

 corn flelds; too wary to be easily caught. 



4. LIBELLULA EXUSTA Say. 



A single male captured near the shore, the dorsal surface of whose abdo- 

 men was already (July 6) deeply pruinose. 



5. GOMPHUS SPICATUS Hagen. 



A single male captured in the grass along shore; no others seen, although 

 carefully searched for. 



6. LEUCORHINIA INTACTA (Hagen). 



Abundant everywhere along shore and for some distance inland. 



7. CALOPTERYX MACULATA (Beauvois). 



Found in the gorge of the Minnehaha River, the outlet of Lake Amelia, 

 below the falls; fairly common. 



8. CALOPTERYX ^QUABILIS Say. 



Found in the same gorge, but not as common as 0. maculata. 



9. LESTES INEQUALIS Walsh. 



Two specimens seen and one captured; not common. 



10. LESTES UNCATUS Kirby. 



A single male captured in the grass near the shore. 



11. ISCHNURA VERTICALIS (Say). 



Fairly common in the grass alongside the lake; only orange females found, 

 no black one. 



12. ENALLAGMA EBRIUM (Hagen). 



Found in company with the preceding species everywhere, even at a dis- 

 tance from the lake shore in the woods and cultivated fields; females 

 as common as the males. 



13. ENALLAGMA HAGENI (Walsh). 



Found everywhere, fairly swarming in the grass along shore and for some 

 distance inland; eaten by Gomphus spicatus. 



