420 REPORT OP COMMISSIONER OF PISH AND FISHERIES. 



Found by us at the following places: Choteau Creek near Springfield; 

 White River near Chamberlain; and North Platte River at Grand Island, 

 Glenrock, and Casper. Only 7 specimens were secured, all of them being 

 small. The sauger is probably equally abundant with the wall-eyed pike in 

 this region, but its habitat seems to extend farther west. Though not attain- 

 ing as large size as the wall-eyed pike, the sauger reaches a length of a foot 

 or more and possesses game qualities which render it a fish of no little 

 importance in the Missouri Basin. The number of pyloric ccBca in six of the 

 seven specimens examined was 4, in the other there were 5. It is not 

 always easy to distinguish the young of these species by external characters, 

 but the number and relative lengths of the pyloric cceca seem to constitute 

 reliable differences. 



120. Perca flavescens (Mitchill). Yellow Perch; Ping Perch. Big Sioux River at 



Sioux City and Sioux Falls, and Silver Lake, Iowa (Meek, 1892) ; East Oko- 

 boji and Spirit lakes (Meek, 1894); Dakota River at Jamestown (Woolman, 

 1896). This perch was found only in the streams about Mitchell, nine speci- 

 mens being obtained from Enemy, Rock, and Firesteel creeks and Dakota 

 River. This is the most western point from which it has been reported, 

 and is probably near the western boundary of its habitat. 



121. Percina caprodes (Rafinesque). Log Perch; Hog-nosed Darter. Eastern Kan- 



sas (Graham, 1885); Snokomo Creek, Wabaunsee County, Kans. (Gilbert, 

 188(3) ; Osage Fork, Marshfield, Mo. ; Lock Fork, Mansfield, Mo. (Meek, 1891). 



122. Hadropterus phoxocephalus (Nelson). Grand River, Clinton, Mo.; Tabo 



Creek, Calhoun, Mo. (as Hadropterus phoxocephalm, Jordan & Meek, 1885); 

 Marais des Cygnes (Graham, 1885) ; Osage River, La Cygne, Kans. (Gil- 

 bert, 1889). 



123. Hadropterus aspro (Cope & Jordan). Snokomo Creek, Wabaunsee County, 



Kans. (Gilbert, 1886); Gasconade and Little Piney rivers, Arlington, Mo. 

 (Meek, 1891); Big Sioux River (Meek, 1892); Floyd River at Sioux City 

 (Meek, 1894); Dakota River at Jamestown (Woolman, 1896). 



The black-sided darter is rare in these States. We found it only in Norfolk 

 Creek at Norfolk Junction and Elkhorn River at Ewing, at which places 20 

 specimens were obtained. All are young fish except 4 from Norfolk Creek. 

 Head 3|; depth 5; eye 4£; snout 4£. Dorsal xn to xiv-14; anal n, 7. 

 Scales 8 or 9-59 to 61-10. Body rather long and slender ; head long, snout 

 long and pointed, not much decurved, the upper lip on level with orbit; 

 premaxillaries not protractile; maxillary reaching vertical of pupil ; lower 

 jaw slightly included; interorbital width narrow, 1\ in eye; gill membranes 

 scarcely united; fins large; longest dorsal spines about 2£ in head; soft 

 dorsal higher, its rays less tban 2 in head ; dorsal fins close together ; origin of 

 spinous dorsal midway between tip of snout and origin of soft dorsal; anal 

 large, as high as soft dorsal; pectoral long, 1J in head, nearly reaching tip of 

 ventrals. Breast and nape naked; cheeks with a few small scales; opercles 

 with larger aud more numerous scales; ventral line of scales somewhat 

 enlarged; lateral lino complete. Colors in alcohol not essentially different 

 from more eastern specimens ; back with about 9 large irregular black or 

 brownish-black blotches, surrounded by paler vermiculations ; side with 

 about 6 or 7 large dark or black blotches which are more or less confluent; 

 under parts pale, without dark markings ; upper parts of opercle and cheek 

 dark ; a dark line downward and another forward from the eye ; base of 

 spinous dorsal pale, then a broad dark band more or less made up of oblong 

 spots on the membranes becoming gradually paler toward top of fin ; soft 

 dorsal and anal barred with brownish ; other fins all plain ; young with a 

 small black spot at base of caudal. Length of longest specimen, 3 inches. 



124. Hypohomus cymatotaenia (Gilbert & Meek). Osage Fork, Marshfield, Mo. ; 



Little Piney River, Arlington, Mo.; Marais River, Dixon, Mo. (Meek, 1891). 



