47 

 NOTES ON OHIO ASTACIDAE. 



By E. B. Williamson. 



In the basin of an old spring on the Ohio State 

 University Campus during- the last week of March, 

 1898. both C. bartonii and C. diogenes were taken. 

 At the same time, a few feet distant in Mirror Lake, 

 C. rusticus was found. Thus at one time, within a 

 circle of five feet radius, the University ampus could 

 boast of three species of crayfish. On March 28, 

 females of C. bartonii had young, 10 mm in length, 

 clinging to the abdominal appendages, while females 

 of C. rusticus taken on the same date were carrying 

 large masses of eggs. 



In the University Museum is also a specimen of 

 C. diogenes collected at Columbus on a paved street, 

 during a spring rain in 1897. 



The two following species have been added to the 

 state list published in last year's Proceedings of the 

 Academy, by Mr. R. C. Osburn and myself. 



11. Camborus blandingii acutus. (Girard). Port- 

 age River. Oak Harbor. Ottowa Co. (Faxon). 



12. Camborus propinquus Girard. Portage 

 River, Oak Harbor. Ottowa Co. (Faxon). 



Additional localities for species recorded for the 

 state are as follows ; 



Camparus bartonii. Warren Co. (Faxon) ; Licking- 

 Co. (R. C. Osburn) ; Tuscarawas Co. (H. L. Rietz) ; 

 Knox Co. (Parker. Williamson. ( sburn) ; Columbus 

 (E. B.Williamson). This is the common brook species 

 throughout the State. 



Cambarus bartonii. robustus Big Jelloway 

 and tributaries. Knox Co. (Parker. Williamson, 

 Osburn). 



