288 EISHES OF ILLINOIS 



ward it is reported from the James and the Roanoke, westward 

 from Kansas to Dakota, and northward from Winnipeg and the 

 Assiniboin. 



In our studies of its food we were not able to distinguish 

 any differences between this and the related species, and the 

 two have, indeed, occurred together in our collections one and a 

 half times as frequently as is the average for the family. 



HADROPTERUS OUACHITVE (JORDAN & GILBERT) 



Jordan & Gilbert, 1887, Proc. TJ. S. Nat. Mus., 49 (Etheostoma). 

 J. & E., I, 1035. 



Length 2 inches*; body elongate, little compressed; depth in length 

 7.14; depth caudal peduncle 3.07 in its length. Color (in spirits) strawish 

 olive; back marked with 7 or 8 rather faint roundish to quadrate blotches; 

 upper portion of sides splashed with W- and X-shaped marks; middle of 

 sides with 8 or 9 large, roundish, and more or less confluent dark blotches; 

 dorsals faintly barred; general aspect much as in young of H. aspro, from 

 which this species differs markedly only in its larger scales. Head slender, 

 bluntly pointed, 4.38 in length; width of head 1.78 in its length; interorbital 

 space flat, considerably less than eye, 5.71 in head; eye 3.08; nose 3.48; 

 mouth moderate, narrow, and slightly smaller than in H. aspro, the maxillary 

 extending to front of orbit; cleft 3.48 in head; lower jaw included; gill-mem- 

 branes scarcely joined at isthmus, distances from muzzle to angle and to 

 back of orbit equal. Dorsal fin XI, 10; the two portions separated by a 

 space equal to width of eye; height of first dorsal 2.11 in head, second 1.6 

 (height of first 75 per cent, of second); caudal truncate; anal II, 8; pectorals 

 .96 in head; separation of ventrals same as width of base. Scales 6, 54, 6; 

 lateral line complete; cheeks naked; posterior portion of opercles with 3 or 

 4 rows of rather large scales; nape and breast nakedf; middle line of belly 

 naked.t 



Probably present in Illinois in the Wabash basin, being 

 represented in our collections by a single specimen, 3.5 cm. in 

 length, taken from the Wabash River at New Harmony, Ind., 

 on April 28, 1900. Originally described from the Saline River, 

 a tributary of the Washita, at Benton, Ark. 



Here described from one specimen. 



HADROPTERUS EVIDES (JORDAN & COPELAND) 



Jordan & Copeland, 1877, Proc. Ac. Nat. Sci. Phila., 51 (Alvordius). 

 J. & G., 503 (Alvordius); M. V., 128 (Etheostoma); J. & E., I, 1036; N., 36 (Etheos- 

 toma); J., 39 (Ericosoma); F., 65; I*, 27. 



Differing from the other species of Hadropterus chiefly in squamation 

 and color pattern, the cheeks and nape naked and opercles with caducous 



* Specimens 3 inchefe long have been obtained by Dr. Jordan (Bull. U. S. Fish Comm.. 

 1888, p. 164). 



t "Scaled" (Jordan and Evermann). 



t "Sometimes with caducous plates" (Jordan and Evermann). 



