SIGMODON. 57 



Color. Head and upperparts maize-yellow and black; top of 

 head and dorsal line much the darkest, being nearly all black; flanks 

 maize-yellow slightly lined with black, being much lighter than back; 

 outer side of limbs like flanks; entire underparts and inner side of 

 limbs grayish white, the hairs being plumbeous at base and with white 

 tips; toes grayish; tail black above, dark brown beneath, naked; 

 ears blackish. Ex type in American Museum of Natural History, New 

 York. 



Measurements. Total length, 230; tail, broken, 50; hind foot, 

 30; full length of tail varies from no to 130. Skull: Total length, 

 35.9; Hensel, 30.2; zygomatic width, 21.6; intertemporal width, 5.2; 

 length of nasals, 15; length of mandible, 12.5; length of lower molar 

 series, 6.8. Ex type in American Museum of Natural History, New 

 York. 



It will be observed that the above differs considerably from Dr. 

 Allen's description, as he calls it a gray animal, while I fail to find 

 any gray about it save on the underparts, where white and plumbeous 

 are mingled. 



Sigmodon vulcani Allen. 



Sigmodon vulcani Allen, Bull. Am. Mus. Nat. Hist., XXII, 1906, 

 p. 247. 



Type locality. Volcan de Fuego, Jalisco, Mexico. Altitude, 

 10,000 feet. 



Color. Head and upperparts cream-buff lined with black; flanks 

 cream-buff, no black; underparts gray; outer side of limbs like back; 

 feet gray; tail above blackish, beneath grayish brown. Ex type in 

 American Museum of Natural History. 



Measurements. Total length, 235; tail, 95; hind foot, 32. Skull: 

 Total length, 34; zygomatic width, 19. Ex type in American Museum 

 of Natural History. 



Sigmodon minimus goldmani Bailey. 



Sigmodon minimus goldmani Bailey, Proc. Biol. Soc. Wash., XXVI, 



1913, P- i3 2 - 



Type locality. 7 miles north of Palomas, New Mexico. Altitude, 

 4200 feet. 



Genl. Char. Similar to S. minimus, but darker. 



Color. Upperparts and head grizzled white, black and buff; under- 

 parts dark fulvous; tail black; hands and feet blackish; ears black. 

 Ex type in United States National Museum. 



Measurements. Total length, 256; tail, 107; hind foot, 31. 

 Skull: Occipito-nasal length, 32.7; Hensel, 27.4; zygomatic width, 



