Mav, igo2. Thk Ich I hnoLOGv ok Mexico — Mkp.k. 85 



Notropis santarosaliae, sp. nov. 



Type, No. 3535, F. C. M. Length, 1.92 inches. 



Locality: Rio Nonava, Santa Rosalia, Chihuahua, Mexico. 



Head 4; depth 4^^; D. 8; A. 10; scales 6-37-3. Body elongate, 

 rather slender: snout pointed: mouth, large terminal, oblicjue; 

 jaws about equal, end of maxillary reaching to middle of the 

 pupil, margin of upper lip on level with center of eye; eye large, 

 3 in head: snout 4. 



Origin of dorsal fin midway between base of caudal and ante- 

 rior margin of orbit, 18 scales in a series before dorsal fin; base 

 of dorsal fin ih in head, its longest ray ih in head; pectorals i| 

 in head; ventrals li; lateral line decurved, complete. The lat- 

 eral line runs about one scale below the lateral band. Color 

 light olivaceous, with a broad dark lateral band from snout 

 through eye to base of caudal. The band is more prominent on 

 the posterior half of the body. It does not end in a black caudal 

 spot: fins all plain. 



This species belongs to the rubrifrous type. It differs from 

 Ni rubrifrons in the shorter snout, more forward position of dor- 

 sal fin, and in the prominent dark lateral band. Taken only at 

 Santa Rosalia. 



Xystrosus popoche Jordan & Snyder. 



Common at both Ocotlan and La Pal ma. 



Falcula chapalae Jordan 6i Snyder. 



Common in Lago de Chapala. La Barca: Ocotlan: La Palma. 



Evarra tlahuacensis, sp. nov. 



Type, No. 3681, F. C. AI. Length, 2.35 inches. 



Locality: Chalco Lake, Tlahuac, Mexico, Mexico. 



Head 4: D. 5J: D. 8: A. 14; scales 95; eye equals snout, 38 in 

 head; upper jaw protractile; teeth 4-4, tips hooked, grinding sur- 

 face fairly well developed. 



Body elongate, rather slender; snout blunt; mouth little 

 oblique; tip of maxillary reaching anterior margin of orbit; diam- 

 eter of the eye equals the length of the snout, 3| in the length of 

 the head; upper jaw protractile; gill membranes connected to 

 isthmus; peritoneum black; the length of the alimentary canal 

 equals distance from eye to tip of caudal fin. 



Origin of dorsal .midway between base of caudal and poste- 

 rior margin of eye; about 38 scales in a series before dorsal fin; 



