72 Field Columbian Museum — Zoology, Vol. V. 



Notropis lutrensis Woolman, Bull. U. S. Fish Comm., 1894, 58; 

 Rio Chihuahua, Chihuahua: Jordan & Evermann, Bull. 47, 

 U. S. Nat. Mus.. 1896, 271: Meek, Field Col. Mus. Pub. 65, 

 1902; Santa Maria; Ahumada; Chihuahua; Santa Rosalia; 

 Jimenez; San Andres; Minaca. 



Small streams' from the Rio Conchos in Chihuahua, north and 

 east to South Dakota. (Sauz; Linares.) 



Head 37^ to 4; depth 3 to 4; D. 7 or 8; A. 8; scales 6 or 7, 36-3. 

 Body elongate, compressed; head rather large; snout slightly bluntish; 

 mouth moderate, oblique; end of maxillary reaching vertical from 

 anterior margin of orbit; teeth 4-4, or 1, 4-4, o, 1 or 2; eye small, 

 about equal to snout, sH to 4 in head; origin of dorsal fin midway 

 between base of caudal and nostril; about 14 to 19 scales in a series 

 between nape and dorsal fin; base of dorsal \% in head, its longest 

 ray 1% in head; pectorals 1^ in head; ventrals i| in head; base of 

 anal 2 in head; caudal fin forked; caudal peduncle moderate, its 

 least depth 2 in head; scales deeper than long; lateral line consid- 

 erably decurved. 



Color bluish above, lighter below; on darker specimens a dark 

 vertical bar behind gill opening followed by a pale vertical bar which 

 in life is red; in males, which have the body entirely covered with 

 tubercles, the body in life is tinged with red, the pectorals, ventrals, 

 and anals a bright red; small specimens with a very faint lateral 

 band on posterior half of body; no caudal spot. Length about 3 

 inches. 



A very variable and widely distributed species. Spawning time 

 the last half of May. 



64. Nototropis macrostomus (Girard). 



Cyprinella macrostoma Girard, Proc. Acad. Nat. Sci. Phila., 1856, 

 198; Devil's River, Texas; China, Nuevo Leon: Girard, Mex. 

 Bd. Sur., 54, pi. xxxi, figs. 5-8, 1859; China, Nuevo Leon. 



Notropis macrostomus Jordan & Evermann, Bull. 47, U. S. Nat. 

 Mus., 1896, 274. 



Streams tributary to the Rio Grande, in northeastern Mexico. 

 (San Juan; Montemorelos.) 



Head 3?; depth 3^; D. 8; A. 8; scales 7-35-2. Body rather 

 elongate, moderately compressed; head conical; snout bluntish; 

 mouth rather large, terminal, the maxillary reaching vertical from 

 front of orbit; eye equal to length of snout, 3X in head; origin of 

 dorsal fin midway between tip of snout and base of caudal; dorsal 

 fin short, its base 2 in head; pectoral i 1 /^ in head; ventrals reaching 

 vent, x% in head; base of anal 2 l { in head; least depth of caudal 



