266 Bulletin ^7, United States National Museum. 



reaching eye ; front of dorsal midway between snout and caudal ; scales 

 deeper than long ; lateral line straight, complete. Light brown, scales 

 above dark -edged ; numerous round dark dots above, the largest some- 

 times nearly size of pupil, the spots unequal and irregularly placed, much 

 as in Hyho]).sis n'stivalis, or H. hyostomus; a plumbeous lateral stripe from 

 eye through snout, ending in a black spot at base of caudal; tins plain. 

 Rio de los Conchos, Chihuahua; locally abundant. 



Notropix chihuahua, Woolman, Amer. Nat., March, 1892, 260, Rio de los Conchos, Chihuahua, 

 Mexico. (Type, No. 44151. Coll. Woolman & Cox.) 



419. NOTBOPIS TOPEKA, Gilbert. 



Head 4 ; depth 3.f ; eye 4;^. D. 8; A. 7; scales 5-35-4. Body compressed, 

 stout and chubby; snout blunt; mouth small, terminal, oblique; 14 scales 

 before dorsal; lateral line anteriorly decurved. Olivaceous, a dusky lat- 

 eral streak ending in a small caudal spot ; males in spring and summer 

 with sides and lower tins bright red or orange. Length 2| inches. West- 

 ern Iowa and eastern South Dakota, (Evermanu), to Kansas; locally 

 abundant in the prairie streams. A well-marked species, apparently 

 allied to the group called Codoma. 



Nolroiiis lopela, Gilbert, Bull. Washburn Lab. Nat. Hi8t., Topeka, 1884, i, 13, tributary of 

 Kansas River, Topeka, Kansas. (Type, No. 36609. Coll. Cragin.) 



NotropUs xneoliis. Hay, Proc. U. S.Nat. Mus., 1887, 245, Solomon River, Wa Keeney, Kansas. 

 (Type, No. 37945. Coll. Hay.) 



Subgenus HUDSONIUS, Girard. 



420. NOTROPIS GILBERTI, Jordan & Meek. 



Head 4; depth 5; eye moderate, about 31. D. 8; A. 9; scales 5-35-4. 

 Slender, with long tail ; head long, flattish above ; snout moderate; 

 mouth rather large, little oblique, the lower jaw included. Lips a little 

 thickened, especially near angle of mouth. 17 scales before dorsal, which 

 is inserted slightly behind ventrals. Light olive ; sides with dusky 

 streaks and dark specks. Length 2i inches. Eastern Iowa to eastern 

 Colorado, abundant in muddy streams of the plains, from the Des Moines 

 River to the Platte. (Named for Dr. Charles Henry Gilbert, joint author 

 of the "Synopsis of the Fishes of North America.") 



Notropis gilberti, JoY^DAS & Meek, Proc. U. S. Nat. Mus., 1885, 4, Des Moines River and 

 Village Creek, Ottumwa, Iowa. (Type, No. 35840?. Coll. Jordan ct Meek.) 



421. NOTROPIS PIPTOLEPIS (Cope). 



Head 4; depth 4^; eye 3+. D. 7; A. 8 ; scales 6-36-4; teeth 1, 4-4, 1. 

 Physiognomy of Hi/bopfiis dissimUis. Body elongate, not elevated. Head 

 elongate. Mouth small, nearly horizontal, the maxillary reaching beyond 

 line of orbit, the maudible somewhat projecting. Region in froutot dorsal 

 fin more or less bare of scales. Dorsal beginning opposite ventrals, nearer 

 snout than base of caudal. Olivaceous ; silvery below ; a broad, silvery 

 lateral band, with dark specks; sides of head with black specks; a dark 

 vertebral band. Length 3 inches. North Platte River. (Cope.) A doubt- 

 ful species, perhaps the same as N. gilberti. {tti-tu, to fall ; /IfTTiV, scale.) 



