22 Evermann — A New Trout from Lower California. 



The Most Southern Salmon. — I owe to my friend, Professor Lupton, 

 two specimens of a black-spotted trout from a locality far south of any 

 which lias hitherto yielded Salmonidse. They are from streams of the 

 Sierra Madre, of Mexico, at an elevation of between 7,000 and 8,000 feet, 

 in the southern part of the State of Chihuahua, near the boundaries of 

 Durango and Sinaloa. The specimens are young, and have teeth on the 

 basihyal bones, as in Salmo purpuratus, which they otherwise resemble. 



Mr. E. W. Nelson visited that locality in August, 1898. He 

 informs me that all the streams of that region flow into the 

 Pacific and that the particular stream in which the trout occurs 

 is a small creek rising on the slopes of Mt. Mohinora, a few- 

 miles south of the mining town of Guadalupe y Calvo, Chihuahua . 

 Mt. Mohinora is the highest mountain in the Sierra Madre be- 

 tween the United States border and the high peaks about the 

 southern end of the tableland in Michoacan. The stream in 

 which the trout occur is only 15 to 20 feet wide and a foot or 

 so deep and is, Mr. Nelson thinks, one of the headwaters of 

 the Rio Culiacan. 



Dr. Meek states* that he was informed by Mr. A. Y. Temple 

 of the Mexican Central R. R., that trout are "found in the 

 Pacific coast streams west of the City of Durango." 



This place also was visited by Mr. Nelson in July, 1898. He 

 saw trout in a small creek at El Salto, Durango, a small ranch 

 in a pine-forested plateau of the Sierra Madre over 7,000 feet 

 above sea level and 70 miles south of west from the city of 

 Durango. This stream is about 25 feet wide and a foot deep 

 and is one of the headwaters of one of the rivers flowing into 

 the Pacific not far from Mazatlan in Sinaloa, probably the Rio 

 del Presidio in north latitude about 24°. Mr. Nelson is not 

 entirely certain on this point. He states that the trout of this 

 stream, as well as those near Guadalupe y Calvo are all small, 

 reaching only 5 to 10 inches in length, and that they are not 

 numerous in cither place. Both localities arc wholly within 

 the yellow pine forest. He has never heard of trout in Mexico 

 in any stream draining into the Rio Grande basin. t 



•The Freshwater Pishes of Mexico north of the Isthmus of Tehuantepec. Field 

 Columbian Museum Publication 93, Zoological Series, Vol. V, 97, September 23, 1904. 



■fSince the above was written, Mr. Nelson has received 5 excellent specimens oi 

 trout Erom El Salto, where thej were collected in 1 1 1» - fall of L907 by tin- Hon. w. C. 

 Bishop, D. 8. vie.' ( tonsul, at Durango < ii\ . Durango. An examination of these speci- 

 mens shows them to be vers distinct from the San Pedro Martir trout. They will be 

 described in a later paper. 



