118 KANSAS UNIVERSITY SCIENCE BULLETIN. 



not notice, nor does disturbing the water seem to affect them, 

 and it is only when they are touched that they manifest fear." 



''The larger of these crayfishes could inflict a pretty severe 

 nip with their pincers, but they did not appear to be as strong 

 in this regard as the outside species." 



Material from Mayfield's cave, Monroe county, Hay makes 

 the types of a new subspecies, C. pellucidus testii. 



Cambarus penicillatus LeO. 



See C. barhatus Fax. 



Cambarus pilosus Hay. 



lo. Kansas. 



1. [Solomon R. or trib.], Beloit, Mitchell county. (Hay, '99.) 

 ?2. Trib. Salt creek, Russell county. (Harris, '00 and '02.) 



t 



So far reported only from the north-central portion of Kansas. 



Harris ('00) gives the following notes on the habits of speci- 

 mens which he refers, with a little hesitation, to this species. 

 *'He [Mr. Sutton, who collected the material] found them July 

 14, burrowing under tussocks of grass on the edge of a small 

 stream in Russell county, Kansas. A first-form male and a 

 female were usually found in each burrow, both taking part in 

 the work of excavation. The whole burrow was under water, 

 running back at first horizontally, then sometimes downward at 

 various angles. The burrows examined ranged from fifteen to 

 to twenty-four inches in length, and were somewhat enlarged 

 and sometimes branched at the end. 



"In burrowing, the mass of mud was pushed out in front of 

 the animal, being held between the anterior end of the animal 

 and the chelae, which were held with the inner margins close 

 together, while the meros was held well up and close to the 

 body, thus forming a sort of prismatic or pyramidal-shaped 

 space between the chelae and the anterior end of the thorax. 

 Mr. Sutton was firmly convinced that the mass of mud was 

 held between the chela? and the body to prevent the mass from 

 going to pieces while being moved along in the water, since 

 when a stone was to be removed it was simply pushed along in 

 front of the chelae.. 



"As was stated above, the whole burrow was made under 

 water, and no attempt was made to construct anything like a 

 'chimney' out of the mud removed. This was simply pushed 



