1906.] Allen, Mammals from Western Mexico. 247 



15. Peromyscus spicilegus spicilegus (Allen). 



Three specimens, Arroyo de Gavilan, Jalisco, Dec. 16-18. These 

 specimens are quite indistinguishable from Escuinapa examples, and 

 are much paler than the rest of the Jalisco specimens. Arroyo de 

 Gavilan is very nearly on the boundary between Tepic and Jalisco. 



1 6. Peromyscus spicilegus simulus Osgood. 



Twenty -nine specimens, collected as follows: Estancia, i speci- 

 men, Feb. 3 ; La Cienega, 4 specimens, April 18 and 25 ; Sal se Puerdes, 



1 specimen, May 7; Wakenakili Mountains, 13 specimens, altitude 

 7000-8000 feet, April 2729 and May 19; La Laja, 3 specimens, 

 May 27; Volcan de Fuego, 7 specimens, July 9, 10, and 22-27. 



The Volcan de Fuego specimens, from an altitude of 10,000 feet, 

 are much darker and richer colored than the others, which are from 

 the tableland, mostly from altitudes of 7000 to 8000 feet. 



17. Peromyscus (Baiomys) musculus (Merriam). 



Thirty-six specimens, collected as follows: Arroyo de Plantanar, 



2 specimens, Feb. 19; Arroyo de Gavilan, 18 specimens, Dec. 19-26; 

 Estancia, 7 specimens, Feb. 24 and March 10; La Laja, i specimen. 

 May 20; Las Canoas, 7 specimens, Aug. 10-18; Tanko Riparti (alt. 

 10,600 ft.V i specimen. Sect. 20. 



1 8. Sigmodon hispidus colimae Allen. 



Thirty -five specimens: Rancho Palo Amarillo, near Amatlan de 

 Canas, Tepic, 4 specimens, Jan. 13, 15; Estancia, Jalisco, near 

 Tepic border, 10 specimens, Jan. 22, 25, Feb. 4, March n; Ojo de 

 Agua, near Amatlan, i specimen, Feb. 16; Rio Sta. Maria, Jalisco, 

 6 specimens, Jan. 13, 15, Feb. i, 2; Las Canoas, near Zapotlan, n 

 specimens, Aug. 6, 9, 15, 20; Artenkiki, 3 specimens, Sept. 10, 17. 



Only 5 or 6 of the specimens taken in January and February are 

 adult, 7 are less than one-fourth grown, and the others range up to 

 one-half to two-thirds grown ; the August and September specimens 

 are all adult, except a litter of 7 nursing young, taken Sept. 20. 



These specimens are not appreciably different from the large 

 series from Escuinapa, Sinaloa (cf. antea, p. 209). 



19. Sigmodon vulcani sp. nov. 



Type, 26310, $ ad., Volcan de Fuego, Jalisco, alt. 10,000 feet, July 25 

 1905; J. H. Batty. 



