FISHES OF THE SOUTHWEST. 389 



enters length exclusive of caudal fin three and one half times. 

 First ray of dorsal midway between base of caudal and posterior 

 rim of orbit. Color, dusky olive above ; silvery white beneath, 

 axils of fins crimson. Habitat, New Mexico. A beautiful speci- 

 men and easily taken. 



Black Chuk. — GiU nigra. Co^. 



Specific ckaj-acters. — Body fusiform ; head enters length 

 minus caudal three and one half times. Scales more numerous 

 than in G. pandora ; upper lip slightly overhanging lower. Color 

 black above, olive beneath. Habitat, rivers and creeks of Arizona, 

 Will take any bait. 



Baird's Chub. — Gila emorzi. Baird and Girard. 



Specific characters. Body elongated and compressed ; head 

 enters total length five times, greatly resembles G. grahami. 

 Color, greyish silver. Habitat, Gila River, Arizona. Will take 

 any bait. 



There are a number of other species of this fish commonly 

 called chub, or pescadito in the southwest, such as Ceratichthyi 

 physignathus of the Arkansas River, Colorado ; C. sterletus of the 

 Rio Grande River, New Mexico ; C. squamilentus of Green River, 

 Wyoming ; and Gila seminuda, of which little is known. Those 

 indicated aiford tolerable sport, and answer well for the table 

 when better cannot be had. 



Suckers. 



Of suckers there are several varieties, including Pantosteus 

 plaiyrhynchus {Cope) ; P.jarrovii iCop€) ; Catostomus fecundui 

 (Cope and Yarrow) ; and C. guzmaniensis (Girard). 



There is also a species of " Red horse," Ptychostomus con- 

 gestus (Girard), met with in the streams of Arizona and Texas. 



SILURID^ AND ANGUILLID^. 



In the Rio Grande are taken many varieties of catfish, the best 

 of which is known as the Amiurus nebulosus (Le Sueur). It will 

 take any kind of bait. Of eels, of which there are also many va- 

 rieties, the best is the Anguilla iyrannus, which is very much 

 like the ordinary eel. 



