SYNOPSIS OP THE CYPRINIJWR OF PENNSYLVANIA. 



363 



bright roseate. In spring and summer adult males have longitudinal rosy lateral shades, 

 and the dorsal and pectoral fins are crimson. 



This chub is a most active and vigorous fish, and haunts especially rapids and falls, — the 

 large individuals in the rivers and the smaller ones in the creeks and runs. It takes the 

 hook without much play, and is good food, though not highly esteemed. When taken 

 from the water it utters a chirruping and croaking noise, more like a voice than any sound 

 heard from any other fresh- water fish of our region. Its food consists largely of " apple 

 smellers," Oyrinidce. Its common name in Pennsylvania is " fall fish." 



Its habitat is the waters of the Susquehanna, Delaware, and other basins eastward to 

 Massachusetts, where it is not common. It is much more abundant in Delaware than 

 Susquehanna waters. 



This species was first described by Abbott, who gives an account of the coloration of 

 the male in spring. He identified it witli the corporalis of Mitchell; the description of 

 that species however applies equally well to the following, and the fact of its being stated 

 to occur in river water (at Albany), and its western distribution, would refer it to the 

 same. This view has been also taken by Putnam, who has published the synonymy given 

 below, but was apparently not acquainted with the S. rhothcus. 



Specimens of both rhotheus and corporalis of 2.5 inches and less in length do not possess 

 barbels in many instances which have come under my notice ; in such a condition they are 

 not distinguishable on the usual basis, from the genus Squalius. Such a specimen I re- 

 ferred on a former occasion to that genus, along with others, which I am now able to 

 separate. 



SEMOTILUS COPPOR ALIS, Mitchell. 



C</priv,us, Mitchell, American Monthly Magazine, ii, 324, and C. 

 atromaculalw, Ibidem. Semotilus dorsulis et cephalus, llafinesque, 

 Ichthyologia Ohiensis. Leuciscus Storeri and iris, Cuv. Val. 



This species is well distinguished from the last, as given in the 

 table, as well as in the adult, by the narrowness of the exposed por- 

 tion of the scales anteriorly as compared with that posteriorly, by the dark spot at the 

 base ol the dorsal fin, and darker colors above, in part caused by the exposure of the dark 

 edges of the scale sacs. The pharyngeal teeth are shorter, and occupy a shorter basis on 

 the bone. 



Dorsal outline arched, descending Steeply to labial margin ; eye little less than one-fifth length of head ; interor- 

 bital breadth one and three-fourths in length above. The relative width of the head differs slightly, some speoi- 



