76 



IIG. Ictalurus natalis, Le Sueur. — Yellow Cat. 



(Bui. II, 6G; Amiurus natalis: Synop.,105; do.) 



Occurs everywhere throughout Illinois, but less abuudantly than nebulostts, 

 and preferring larger streams. It has not been taken by us from ponds and 

 lakes except where these were immediately connected with streams subject to 

 overflow. 



117. Ictalurus nebulosus, Le Sueur. — Bull-head; Horned Pout; Small 



Cat-fish. 



(Bui, II, 66; Amiurus vulgaris Amiurus catus, Amiurus melas, Amiurus 

 xantnocephalus : Synop.,104; Amiurus xanthocephalus, Amiurus melas, 



Amiurus catus.) 



Abundant in all waters, frequenting by preference ponds and muddy 

 streams. It occurs, however, in clear lakes and creeks, and has been taken 

 by us occasionally in the larger rivers. It is the everywhere abundant "bull- 

 head," or "bull-pout." 



118. Ictalurus marmoratus, Holbrook. — Marbled Cat. 



(Bui. II, 67; Amiurus marmoratus: Synop., 104; do.) 



The marbled cat has not occurred in the northern part of the State, but 

 seems to be most abundant in the Illinois and its tributaries. Confined almost 

 wholly to the larger streams and their immediate affluents, in Central and 

 Southern Illinois. 



Genus 62. Leptops, Raf. 

 Mud Cats. 



119. Leptops olivaris, Raf.— Mud Cat; Yellow Cat. 



(Bui. II, 67; Pelodicfithys olivaris.) 



Common in the larger streams. Obtained by us only from the Illinois, Wa* 

 bash and Ohio rivers. 



Genus 63, Noturus, Raf. 

 Stone Cats. 



120. Noturus flavus, Raf.— Common Stone Cat. 

 Rather common in Illinois, in creeks of moderate size. 



121. Noturus exilis, Nelson. 



Rare in this State, only two specimens occurring in our collections besides 

 the original type. Creeks in DeKalb, Woodford, and Union counties. 



122. Noturus minicrus, Jordan. 



Taken by us only in Southern Illinois, in the Cache and Wabash rirers. 



123. Noturus gijrinus, Mitch. 



(Bui. II, 68; Noturus sialis.) 



This species occurs throughout Illinois, but has been coufiued in our collec- 

 tions mostly to lakes, rivers and large creeks. It is not by any meaus re- 

 stricted to rocky situations, but seems rather to prefer the muddy parts of 

 both the rivers and lakes in which it occurs. 



