560 MERRIAM 



ODOCOILEUS HEMIONUS CANUS subsp. nov. 



Type from Sierra en Media, Chihuahua, Mexico. No. 99361. $ ad. 



U. S. National Museum, Biological Survey Coll. October 7, 1900. 



E. W. Nelson and E. A. Goldman. Orig. no. 13996. 



Characters. — Similar in general to O. hemionus but in fresh winter 

 pelage very much paler and grayer; throat pale gray, faintly vermic- 

 ulated [in hemionus much darker and more heavily grizzled with 

 blackish] ; white of chin less sharply defined ; breast less black ; ingui- 

 nal region white instead of buff ; face, top of head, ears, and outer 

 side of thighs much paler; dorsal neck stripe narrower, paler, and 

 grizzled throughout; upper side of tail dark on basal half and in some 

 specimens all the way to the black tip. The usual nose and tail mark- 

 ings are present but those on the nose are paler and more diffuse. 

 The hoofs are larger than in hemiot?iis from northern Arizona and 

 eastern Colorado. 



Cranial characters. — Skull like that of heviioniis but muzzle 

 broader; nasals broader and flatter (less pinched in) ; antlers similar 

 but lighter and more slender, the beam rather short and concave an- 

 teriorly — not long and straight as in erem'icus Mearns from the desert 

 region about the Gulf of California. 



Aleasurenients. — Type specimen ( $ ad.) : total length 1S30 mm. ; 

 tail vertebrae 230; hind foot 500; height at shoulder 955. 



TYLOMYS TUMBALENSIS sp. nov. 



Type from Tumbala, Chiapas, Mexico. No. 76059. $ yg-ad. U. S. 

 National Museum, Biological Survey Coll. Oct. 23, 1895. E. W. 

 Nelson and E. A. Goldman. Orig. no. S568. 



Characters. — Size rather large, apparently larger than midlcaudiis 

 and with much larger hind feet ; ears large and nearly naked ; tail long 

 and naked, the posterior half yellow; color brownish gray (becoming 

 brownish fulvous with age?). 



Color. — (Type specimen, yg-ad.) Upperparts dark gray, darkest 

 on top of head and (broadly blackish) along median part of posterior 

 half of back to base of tail; sides lightly washed with brownish; 

 face dark gray ; a broad dusky ring around eye ; chin, pectoral region 

 and small patch in inguinal region whitish; throat and belly plumbe- 

 ous, washed with buffy fulvous ; fore and hind feet and toes dark 

 brownish, with a few white hairs at base of toes; basal half (or a 

 little more than half) of tail blackish, terminal half yellow. 



Cranial characters. — Skull large, long and flat. Differs from 

 nudicaudus as follows: less massive and more slender; rostrum and 



