IGO 



3. Le-^tcs di-yuuctu-'^ Selyti. 



A male and female taken by Mr. E. B. Williamson in the swamp south 

 of the lake on July 13, 1900. One female taken by the writer south of the 

 lake .Tuly 23, 1900. 



4. lA'xtcti rectanguIan'K Say. 



Four males taken l)y Mr. E. P.. Williamson in the swamp south of the 

 lake, Julj' 13, 1900. One male taken by the writer at the same place, 

 July 6, 1901. 



5. Lpiftcs riijilax Hagen. 



One female was taken August ITi, 1900, south of the lake. 



6. Lextf's inc(jaalix Walsli. 



One female was taken in the spatterdock beds on the south shore of 

 the lake, July 8, 1901. 



7. Argla ptifrt'da (Hagen). 



Occasional on the sand t)ank and pier at the mouth of Cherry Creek. 



8. Argla viol area (Hagen). 



Fairly common about the water. This species is especially abundant 

 a Ions' the banks of Cherry Creek during August. 



9. Argla Hcdala (Hagen). 



One specimen, a male, was taken July 8, 1901. along the south shore of 

 the lake. 



10. Argia fibidlix (Rambur). 



Three males of this species were taken south of tlie lake, July 13, 1900, 

 E. B. Williamson. 



11. Argiit (ipiciih's (Say). 



Two males were taken by Mr. E. B. Williamson, south of the lake, 

 July 13, 1900. One female was taken by the Avriter July 2G, 1901, in the 

 same swamp. 



12. Xchahiniid jiosita (Hagen). 



Common in the grass about tlie laboratory. 



13. Xi'hiih-nnia ircne (Hagen). 



One specimen, a male, was taken l)y Mr. E. B. Williamson near the 

 Biological Station, June 22, 1901. 



14. Enallagma hageni (Walsh). 



This species is common in the vegetation along the shores of the lake 

 until the middle of July. 



