. N, 1-1/2 mi. W Elkhart, 2. _Seward County_: 3 mi. NE Liberal, 1.
_Stanton County_: 1 mi. N, 6-7-1/2 mi. W Manter, 2; dam of Lake
Stanton, 1.

NEW MEXICO. _Bernalillo County_: 6-1/2 mi. E Alameda, 11; 5 mi. W
Albuquerque, 3. _Catron County_: 1 mi. NE Apache Creek, 4; Apache
Creek, 2. _Guadalupe County_: 4 mi. SW Santa Rosa, 4700 ft., 10.
_McKinley County_: Upper Nutria, 7200 ft., 2. _Rio Arriba County_: 4
mi. N El Rito, 1; 1 mi. SE El Rito, 1. _Sandoval County_: 3 mi. N La
Cueva Rec. Area, 1. _San Juan County_: 2 mi. N La Plata, 15. _Santa
Fe County_: 1 mi. W Santa Fe Municipal Airport, 1; La Bajada Grade,
20 mi. W Santa Fe, 1. _Socorro County_: 2 mi. S San Antonio, 4.

OKLAHOMA. _Beaver County_: 7 mi. S Turpin, 1. _Texas County_: 3-1/2
mi. SW Optima, 8.

TEXAS. _Hansford County_: 10 mi. S, 1 mi. W Gruver, 2. _Hutchinson
County_: 9 mi. E Stinnett, 1 (TU).

_Reithrodontomys megalotis dychei_ J. A. Allen

_Reithrodontomys dychei_ J. A. Allen, Bull. Amer. Mus. Nat. Hist.,
7:120, May 21, 1895 (type locality, Lawrence, Douglas Co., Kansas).

_Reithrodontomys megalotis dychei_, A. H. Howell, N. Amer. Fauna,
36:30, June 5, 1914.

_Reithrodontomys dychei nebrascensis_ J. A. Allen, Bull. Amer. Mus.
Nat. Hist., 7:122, May 21, 1895 (type locality, Kennedy, Cherry Co.,
Nebraska).

_Distribution._--Southwestern Wisconsin, southern Minnesota,
northwestern Illinois, Iowa, Missouri and northwestern Arkansas,
west through Kansas (except southwestern part), Nebraska and the
Dakotas to the foothills of the Rocky Mountains from central
Colorado to southeastern Alberta.

_External measurements._--Average and extremes of 17 adults (11
males, 6 females) from Douglas County, Kansas, are: total length,
134.2 (115-151); length of tail-vertebrae, 64.2 (59-72); length of
hind foot, 16.7 (15-18); length of ear from notch, 13.4 (12-15);
tail averaging 91.7 per cent of length of body. Corresponding
measurements of 20 adults (14 males, 6 females) from Cherry County,
Nebraska, are: 135.3 (122-155); 62.9 (56-72); 17.5 (17-18); 13.0
(12-14); tail averaging 86.9 per cent of length of body. For cranial
measurements see Tables 1 and 2.

_Remarks._--From _Reithrodontomys megalotis aztecus_, geographically
adjacent to the southwest, _R. m. dychei_ differs as follows: upper
parts averaging darker (especial