6 KANSAS UNIVERSITY SCIENCE BULLETIN. 



5. Cambarus immunis Hagen. 



Mr. Crevecoeur collected C. immunis in a stagnant pond on 

 the prairie near Onaga, Pottawatomie county, April 1, 1901. 



The pond had been in existence about six years, and had never 

 been known to go dry. The nearest creek was about a quarter 

 of a mile away. They were probably never connected when 

 the water was high in the creek. No fish had ever been taken 

 in the pond, but specimens of Ambly stoma tigrinum (green) were 

 found. (A. tigrinum and C. immunis are sometimes found in 

 the same ponds in Douglas county.) 



Among a dozen specimens given to me, some of the females 

 were carrying eggs but none were noticed with young. 



Mr. Crevecoeur drained the pond in obtaining the material, 

 and was careful to secure a representative collection. If C. 

 gracilis were common in the region, it would not be improbable 

 that females would be found in the pond at this time. 



Reports so far would indicate a distribution of this species 

 from the Missouri river west along the Kansas and its tribu- 

 taries nearly two-thirds the distance across the state. 



5a. Cambarus immunis Hagen, var. spinorostris Faxon. 



The limits of distribution are embraced within those given 

 for C. immunis. 



6. Cambarus nais Faxon. 



So far as reported, this species is confined to the southeastern 

 portion of the state, drained by the tributaries of the Arkansas 

 river. 



7. Cambarus virilis Hogue. 



23. Wakarusa river, Douglas county. 



24. Bull Foot creek, Lincoln county. Taken under stones, 

 in about six inches of running water. Miss Ella Weeks, coll. 



25. Spillman creek, Lincoln county. Under stones, in shal- 

 low running water. Miss Ella Weeks, coll. 



26. Wildcat creek, about two miles west of Manhattan, Riley 

 county. 



27. Crayfish are not at all common in the lower part of the 

 Kansas river, at least near Lawrence, where I have had oppor- 

 tunity to observe it. The fishermen, as a rule, say there are 



