Mav, 1902. The IcHTHvoI,o<;^■ ok Mf.xico— Mkkk. 83 



the prominent lateral band and the black spot on base of middle 

 caudal rays. Santa Rosalia: Jimenez. 



Notropis calientis Jordan cV Snyder. 



Abundant at Aguas Calientes: a few specimens were also 

 taken near Ocotlan, and at Acambaro. Most of the specimens 

 from Aguas Calientes are covered with parasites. Ovaries well 

 developed in the females from Aguas Calientes, indicating a close 

 approach to the spawning season. These specimens were taken 

 June 7. Largest specimens 2^ inches in length. Aguas Cali- 

 entes: -Ocotlan; Acambaro. 



Notropis nigrotaeniatus Gunther. 



This species is very abundant at Puente de Ixtla and Balsas. 

 It Avas first taken by Boucard at Atlisc'o, in the head waters of one 

 of the northern tributaries of the Balsas River. The types are 

 reported to be 4 inches in length. Of a large number taken by 

 us the longest is but 3 inches in length, the average length being 

 2-| inches. This is the only species of this genus found south 

 of the City of Mexico. It is our most southern cyprinoid. No 

 species of the genus Notropis is found in the United States west 

 of the great divide, and so it seems rather strange that the most 

 southern range of this large group of fishes should be in a Pacific 

 coast stream. 



Eggs quite well developed, evidently approaching the spawn- 

 ing season. Our specimens were collected about the 22d to 26th 

 of April. Spawning season probably in May. Balsas; Puente 

 de Ixtla. 



Notropis chihuahua Woolman. 



This is one of the best marked species in the genus. At pres- 

 ent it is known only from the upper portion of the Conchos River 

 system, where it is abundant. Eggs well developed, apparently 

 near the spawning season. Longest specimens, 2.50 inches. Chi- 

 huahua: San Andres; Santa Rosalia: Jimenez. 



Notropis ornatus (Girard). 



This species is found on both sides of the divide. Specimens 

 from Mihaca average smaller than those from Chihuahua, the 

 longest from the former place being 2.30 inches, the longest from 

 the latter being 2.55 inches in length. 



The smaller specimens show only traces of the dark vertical 



