72 Field Columbian Museum — Zoolocv, Vol. III. 



Colonia Juarez: Chihuahua, Mexico, Rio Casas Grandes, June 26. 



Guzman: Ciiiiuiahua, Mexico, spring near railroad station, June 25. 



Santa Maria: Chihuahua, Mexico, springs and ponds near clubliouse, 



June 24. 

 San Jose: Chihualuia, Mexico, spring at San Jose rancli, Lago de Patos, was 



nearly dry. N\) fisli in the few pools left, June 21. 

 Ahumada: Chihuahua, Mexico. A large irrigating ditch. No water in the 



Rio Carmen, June 22. 

 Chihuahua: Chihuahua, Mexico, tributary of the Rio Conchos, June ig. 

 Santa Rosalia: Chihuahua, Mexico, Rio Noavaco, June 10, 

 Jimenez: Chihuahua, Mexico, Rio Conchos, June g. 

 San Andres: Cliihualuia, Mexico, Rio Santa Cruz, June 17, 18. 

 Bustillos: Chihuahua, Mexico, Lago de Castillo, the lake was dry except a 



few small holes, June 14. 

 Minaca: Chihuahua, Mexico, Paphigochic, June 16, 17. 

 Aguas Calientes: Aguas Calientes, Mexico, Rio Verde, June 7. 

 Lagos: Jalisco, Mexico, tributary of the Rio Verde, and small lake near the 



city, June 6. 

 La Barca: Jalisco, Mexico, Rio Lerma, June 5. 

 Ocotlan: Jalisco, Mexico, Rio Grande de Santiago and a few bayous, June 



2 and 3. 

 Celaya: Guanajuatt), Mexico, small stream tributary 'to the Lerma, May 28. 

 Ocambart): Guanajuato, Mexico, I-iio Lerma, May 27. 

 La Palma: Michoacan, Mexico, Lago de Chalco, May 30, 31. 

 Huingo: Michoacan, Mexico, Lago de Quitzeo, May 26. 

 Patzcuaro: Michoacan, Mexico, Lago de Patzcuaro, May 18 to 22. 

 Zirahuen: Miclu)acan, Mexico, Lago de Zirahuen, May 24. 

 San Juan del Rio: Queretaro, Mexico, Rio Moctezuma, May 16. 

 Chalco: Mexico, Mexico, Lago de Chalco, April 30, May i. 

 Texcoco: Mexico, Mexico, Lago de Texcoco, May 13. 

 Puente de Ixtla: Morelos, Mexico, Rio Ixtla, April 24 to 26. 

 Balsas: Guerrero, Mexico, Rio Balsas and I^io Cuculo, April 22 and 23. 

 Venta Salada: Puebla, Mexico, Rio Tehucan, May 6, igoi. 

 Cuicatlan: Oaxaca, Mexico, Rio Ouiotepec, May 5, igoi. 

 Oaxaca: Oaxaca, Mexico, I-lio Verde, May 4, igoi. 

 Jalapa: Vera Cruz, Mexico, tributary of Rio San Francisco, May g. 

 La Antigua: Vera Cruz, Mexico, Rio San Francisco, May 10. 



LEPISOSTEID.E. 

 Lepisosteus osseus (Linnaeus). 



Four specimens of this species were taken at Santa Rosalia. 



SILURID^. 



Istalarius balsanus Jordan & Snyder. 



Bagre. 



This species is quite common at the Balsas. Several large 

 specimens were taken from the main river. The fontanelle was 

 well developed in specimens over 2 feet in length. 



