MAMMALS OF THE MEXICAN BOUNDABY. 403 



Border, which constitute a very homogeneous group. At present I am 

 inchiding truei, hoylii, and even stepJiensi (which is near eremicus) in 

 the subgenus Peromy.scus. The characters of the feet and tail in this 

 subgenus are indicated in fig. 79. 



a b . c 



Fig. 79.— Peeomtscus leucopds. u,, fobefoot; 6, hindfoot; c, tail. 



PEROMYSCUS MEARNSII (Allen). 

 HEARNS MOUSE. 



Vesperimus meamsii Allen, Bull. Am. Mus. Nat. Hist., Ill, No. 2, Art. XX, June 30, 



1891, p. 299 (original description). 

 Sitomys meamsii, Beyant, Zoe, III, Oct., 1892, p. 214. — Allen, Bull. Am. Mus. Nat. 



Hist., VI, May, 1894, pp. 179-181. 

 P[eromyscus] meamsii, Attwatek, Bull. Amer. Mus. Nat. Hist., V, Nov. 8, 1895, p. 331 . 

 Peromyscus meam,si, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 132 (Synop. Mam. 



N. Am.): 

 Peromyscus meam,sii, Miller and Rbhn, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, 



Dec. 27, 1901, p. 78 (Syst. Results Study N. Am. Mam. to close of 1900). 



Type-locality. — Brownsville, Texas. (Type, skin and skull, in the 

 American Museum of Natural History.) 



Geographical range. — This species inhabits the TamauUpan Trop- 

 ical Tract, in southern Texas, where it has been found, along the 

 Gulf of Mexico, in the strip of country extending from Rockport to 

 Brownsville. 



Description (based on seven topotypes). — Upper surface dusky 

 grayish-brown, suffused with fawn color, which is strongest on the 

 sides; under parts pure white in winter, grayish white in summer; 



