HARRIS: CRAYFISHES OF KANSAS. 271 



parts of the stream than at the rocky 'riffles.' C. virilis can, and 

 does, live in muddy places. As mentioned above, it is sometimes 

 found in muddy ponds and roadside ditches with C. ivununis, and 

 I have taken a great many from Washington creek, Douglas county, 

 where the mud is as soft and deep as in either of the creeks men- 

 tioned above. 



In the winter C. virilis may be found under flat stones in the 

 rocky creeks, even when the water is covered with ice. When 

 taken from the water they are so numb as to be almost incapable 

 of movement, but liven up when held in the hand for a short time 

 and are as active as ever after a few hours in the laboratory. 



The eggs are laid in the spring, none being found on the females 

 collected during the winter. The ovarian eggs of specimens taken 

 in January seem to be fully developed, so far as may be seen from 

 examination with the naked eye. 



C. virilis seems to be the most widely distributed species in our 

 state, being reported from fifteen different counties. 



8. Cambarus rusticus Girard. 



C. rustic us, Girard, '52. 



C. rusticus, Hagen, '70. Descriptive notes, with figs, of abd. 

 app. of male, F. I and II, lamina, epistoma and "spina externa." 



C. placidus, Hagen, '70, with figs, of abd. app. of male, F. I and 

 II, lamina, epistoma and "spina externa." 



C. juvenalis, Hagen, '70, with figs, of abd. app. of male, F. I and 

 II, lamina, epistoma, and "spina externa." 



C. 7visconsiensis, Forbes and Bundy, '76, male. 



C. ivisconsiensis, Bundy, '82, Form ?). 



C. ivisconsiensis, Bundy, '83 (Form ?). 



C. rusticus, Faxon, '84, note. 



C. rusticus, Faxon, 85, with figs, of abd. app. of male, F. I and 

 II. 



C. rusticus, Hay, '96. with sktches of carapace, lamina, annulus 

 and first abd. app. of male, F. I and II. 



I. Osage river, La Cygne, Linn county (Mus. Comp. Zool.), 

 (Faxon, '90). 



9. Oambarua rilopus Hay. 



C. />ilosus, Hay, '99, male, F. II, with sketch of carapace, lamina, 

 and abd. app. 



I. Beloit, Mitchell county (coll. U. S. Nat. Mus.), (Hay, '99). 



