66 PROCEEDINGS : BOSTON SOCIETY NATURAL HISTORY. 
Subfamily CRICETINAE. 
Genus ONYCHOMYS Baird. 
1857. Onychoinys Baird, Mamm. N. Amer., p. 458. Type.— 
Ilypudaem leiicogaster Wied. 
Onychomys arcticeps Rhoads. 
1898. Onychornys arctice 2 )s Rhoads, Proc. acad. nat. sci. 
Phila.,p. 194. May 3, 1898. 
Type locality. — Clapham, Union County, New Mexico. 
Onychomys fuliginosus Merriam. 
1890. Onychomys fuliginosus Merriam, North Amer. fauna, 
no. 3, p. 60. September 11, 1890. 
Type locality. — Black Tank lava beds, northeast of San 
Francisco Mountain, Coconino County, Arizona. 
*^Onychomys leucogaster (Wied). 
1841. Hypudaeus leucogrister Wied, Reise in das innere 
Nord Amerika, ii, p. 99. 
1857. Onychomys l&ucogaster Baird, Mamm. N. Amer., p. 
459. 
1885. Hespjerornys leiicogaster True, Proc. U. S. nat. mus., 
VII (1884), p. 597. 1885. 
Type locality. — Clark, Clark County, South Dakota. 
Onychomys leucogaster brevicaudus Merriam. 
1891. Onychomys leucogaster brevicaudus Merriam, North 
Amer. fauna no. 5, p. 52. July 30, 1891. 
Type locality. — Blackfoot, Bingham County, Idaho. 
Onychomys longicaudus Merriam. 
1889. Onychomys longicaudus Merriam, North Amer. fauna, 
no. 2, p. 2. October 30, 1889. 
Type locality. — St. George, Washington County, Utah. 
Onychomys longipes Merriam. 
1889. Onychomys longipes Merriam, North Amer. fauna, 
no. 2, p. 1. October 30, 1889. 
Type locality. — Concho County, Texas. 
