288 FISHES OF ILLINOIS 



HADROPTERUS OUACHITvE (Jordan & Gilbert) 



Jordan & Gilbert, 1SS7, Proc. U. S. Xat. 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 blotch- 

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

 dle 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-membranes 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 com- 

 plete; cheeks naked; posterior portion of opercles with 3 or 4 rows of 

 rather large scales; nape and breast nakedf; middle line of belly naked. J 



Probably present n Illinois in the Wabash basin, being repre- 

 sented 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. Xat. Sci. Phila., 51 (Alvordius). 

 1. & G., 503 (Alvordius); M. V., 128 (Etheostoma); ]. & E., 1. 1036; \\, 36 (Ethosto- 

 ma); J., 39 (Ericosoma); F., 65; L., 27. 



Differing from the other species of Hadropterus chiefly in squamation 

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

 scales. "Coloration extremely brilliant; * * * sides with about 7 

 broad transverse bars extending from below the lateral line on one side, 

 across the hack, and down on the other side; these bars wider than the 

 eye and connected along lateral line by a faint black stripe; * * * 

 spinous dorsal with a dusky spot on its posterior rays, and the fins desti- 

 tute of the dark bars found in related species" (Jordan and Evermann). 



♦Specimens 3 inches long have been obtained bv Dr. lordan (Bull. U. S Fish 

 Comm . 1888, p 164). 



f'Scaled" (Jordan and Evermann). 



f'Sometimes with caducous plates ' (Jordan and Evermann). 



