BERTRAM G. SMITH. 



II. The Adults. 



A. Habits Not Peculiar to the Breeding Season, 



Habitat. — CryptobrancJius was found most abundantly in a 

 large creek tributary to the Allegheny River, and the most favor- 

 able locality extended from its confluence with the Allegheny 

 five or six miles up the stream. 



The stream has a rather rapid descent, and a gravelly or rocky 

 bottom. Shallow and rocky rapids make up the greater portion 

 of its course, alternating with areas of deeper and more quiet 



Fig. i. Typical habitat of CryptobrancJius allegheniensh. 



water. It is in the former situations (see Fig. i) that Crypto- 

 branclius abounds, lying concealed for the greater part of the 

 time in crevices or caverns under large rocks in the stream bed. 

 It is seldom that more than one individual is found under a rock, 

 hence its life is in general a solitary one. 



So far as my observations extend, CryptobrancJius comes forth 

 but seldom in the day time, except during the breeding season. 

 At night they venture abroad, perhaps in search of food ; and 



