458 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



Ocheiodon mexicanus , AhhEN , Bull. Am. Mus. Nat. Hist., Ill, p. 223, Apr. 29, 1891, 



(Bee County, Texas; Santa Teresa, Tamaulipas). — ^Thomas, Proc. Zool. Soc. 



Lond., 1888, p. 447 (Duval County, Texas). 

 [Beithrodontomys] (mexicanus) intermedins, Elliot, Field Col. Mus., Zool. Ser., II, 1901, 



p. 153 (Synop. Mam. N. Am.). 

 Bleithrodontomys] mlexicanus] intermedius, Elliot, Field Col. Mus., Zool. Ser., IV, 



1904, pp. 257 and 264 (Mam. Mid. Am.)! 



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

 American Museum of Natural History, New York.) 



Geographical distribution. — Tropical zone of northeastern Mexico 

 and adjacent part of Texas, extending up the Gulf coast as far as 

 Corpus Christi. In the interior of Texas, represented by Reithro- 

 'dontomys laceyi Allen. 



The following is the original description: 



Description. — Similar in size and proportions to R. mexicanus, but very much paler. 



Adidt. — Above grayish brown, washed with pale yellowish, varied slightly vdth darker 

 hairs over the median area of the back, lighter on the sides, and becoming more yellow 

 along the lateral line. Below white, the hairs plumbeous at base and broadly tipped with 

 white. Ears brown, darker toward the margin on the outer surface, thinly haired, the 

 very short hairs on the apical third of the inner surface rufous. Feet soiled white. Tail 

 dusky, nearly unicolor (the lower surface a little lighter than the upper) , nearly naked, the 

 annuli nearly always conspicuouslj' visible. 



Young. — Paler and more nearly uniform above, with less of the pale fulvous wash; 

 beneath with less white to the tips of the hairs; the dusky earmark more conspicuous. 



Measurements. — Type, 9 ad.: Length, 194; tail vertebrae, 108; hind foot, 21; ear (from 

 skin), 13; ratio of tail vertebrae to total length, 54.6 



Fifteen specimens from Brownsville, Texas, measure: Length, 178 (160-198); tail ver- 

 tebra;, 98.7 (90-110); hind foot, 20 (19-21); ear (from skin), 12 (11-13); ratio of tail ver- 

 tebra?, to total length, 55.5 (53-58.5). (Bull. Am. Mus. Nat. Hist., VII, 1895, p. 136.) 



REITHRODONTOMYS LACEYI 'Allen. 



LACEY HARVEST-MOUSE. 



Beithrodontomys laceyi Allen, Bull. Am. Mus. Nat. Hist., VIII, p. 235, Nov. 21, 

 1896 (original description). — Millee and Reun, Proc. Bost. Soc. Nat. Hist., 

 XXX, No. 1, Dec, 27, 1901, p. 97 (Syst. Results Study N. Am. Mam. to the 

 close of 1900). 

 Beithrodontomys mexicanus intermedius Allen, Bull. Am. Mus. Nat. Hist., VII, p. 

 136, May 21, 1895, (in part); 1896, p. 66 (neighborhood of San Antonio, Texas). 

 [Beithrodontomys] laceyi, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 153 (Synop. 

 Mam. N. Am.). 

 Type-locality. — Watson's Ranch, 15 miles south of San Antonio, 

 Texas. (Type, skin and skull, in the American Museum of Natural 

 History, New York.) 



Geographical range. — Lower Sonoran Zone of the Middle Texas 

 Tract. 



The following is the original description : 



Description. — Above yellowish brown, strongly mixed with blackish, the black-tipped 

 hairs increasing in abundance toward the median line without, however, forming a distinct 

 dorsal area generally an indistinct fulvous latei-al line, varying in distinctness according to 

 the season. Below grayish white, the fur plumbeous at base and tipped broadly with 



