RODENTIA: CRICETIDAE 513 



Type Locality. — Jalapa, Veracruz, Mexico. Range. — East-central Mexico, in 

 slightly more humid parts than those inhabited by musculus. 



Baiomys musculus nigrescens (Osgood) f* 



1904. Peromyscus musculus nigrescens Osgood, Proc. Biol. Soc. Washington, 



vol. 17, p. 76, Mar. 21, 1904. 

 1912. Baiomys musculus nigrescens Miller, U. S. Nat. Mus. Bull. 79, p. 137, 



Dec. 31, 1912. 

 Type Locality. — Valley of Comitan, Chiapas, Mexico. Range. — Southern 

 Mexico (State of Chiapas) to central Guatemala (Goodwin, Bull. Amer. Mus. 

 Nat. Hist., vol. 68, p. 40, Dec. 12, 1934) . 



Baiomys musculus grisescens Goldmanf* 



1932. Baiomys musculus grisescens Goldman, Proc. Biol. Soc. Washington, 

 vol. 45, p. 121, July 30, 1932. 



Type Locality. — Comayaguela, on Rio Grande opposite Tegucigalpa, Francisco 

 Morazan, Honduras. Altitude, 3,100 feet. Range. — From western and central 

 Honduras south to Matagalpa in north-central Nicaragua (Goodwin, Bull. 

 Amer. Mus. Nat. Hist., vol. 79, p. 160, May 29, 1942) . 



Genus ONYCHOMYS 19 Baird (grasshopper-mice) 

 1858. Onychomys Baird, Mammals, in Rep. Expl. Surv. Railr. to Pacific, vol. 

 8, pt. 1 (Washington, 1857) , p. 458, July 14, 1858. (Type, Hypudaeus 

 leucogaster Wied-Neuwied.) 



Onychomys leucogaster leucogaster (Wied-Neuwied) * 



1841. Hypudaeus leucogaster Wied-Neuwied, Reise in das innere Nord-Amer- 



icain . . . 1832 bis 1834, vol. 2, p. 99. 

 1858. Onychomys leucogaster Baird, Mammals, in Rep. Expl. Surv. Railr. to 



Pacific, vol. 8, pt. 1 (Washington, 1857), p. 459, July 14, 1858. 



1884, Hesperomys leucogaster True, Proc. U. S. Nat. Mus., vol. 7 (App., 

 Circ. 29) , p. 597, Nov. 29, 1884. 



1885. 0[nychomys] leucogaster var. pallidus Herrick, Geol. Nat. Hist. Surv. 

 Minnesota, Ann. Rep. 1884, p. 183. (Lake Traverse, near sources of Minne- 

 sota and Bois des Sioux Rivers, S. Dak.) 



1889. O[nychomys] leucogaster Merriam, North Amer. Fauna No. 2, p. 1, 

 Oct. 30, 1889. 



Type Locality. — Mandan Indian village, near Fort Clark, northeastern Oliver 

 County, N. Dak. (see V. Bailey, North Amer. Fauna No. 49 (December 1926), 

 p. 82, Jan. 8, 1927). Range. — From Roberts County (Lake Traverse and Sisse- 

 ton) in northeastern South Dakota; near West Lake Okoboji, Dickinson County, 

 northwestern Iowa (regarded as breviauratus by Dice, Journ. Mamra., vol. 5, 

 No. 1, p. 66, Feb. 9, 1924) ; Brown's Valley in Traverse County and Parker's 

 Prairie in southeastern Otter Tail County, western Minnesota (Swanson, Minne- 

 sota Dept. Conserv. Techn. Bull. 2, p. 85, 1945) ; and Red River Valley (Hankin- 

 son and Pembina) westward in prairie region of North Dakota to Linton, Fort 

 Clark and Minot; and northward into southwestern Manitoba (Oak Lake), north 

 to border of Riding Mountain National Park, and intergrading with missourien- 



18 Revised by Hollister, Proc. U. S. Nat. Mus., ■vol. 47, pp. 427-489, Oct. 29, 1914. 



