472 



BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



Type-locality. — North Beaver River, Pan Handle of Oklahoma, 

 near the New Mexico, line. (Type, skin and skull, in the American 

 Museum of Natural History, New York.) 



Geographical range. — Eastern Desert Tract. Taken on the Mexican 

 Boundary, from Fort Hancock, Texas (on the Rio Grande), west to 

 Monument No. 15, fifty miles west of the Rio Grande. 



Description. — Smaller; length, 310 mm.; tail vertebrae, 125; hind 

 foot, 36; ear from crown, 22; skull, 43 by 24; color, smoke gray, 

 much paler than that of the typical micropus, which is "slatish gray," 

 as described by Baird. 



RemarTcs. — I am indebted to Dr. J. A. Allen for the opportunity of 

 examining his types of this race. The characters which he ascribes to 

 it — small size and pallid coloration — are borne out by his series and 

 strongly emphasized by the series from southwestern Texas and north- 

 western Chihuahua, collected by the International Boundary Commis- 

 sion. I consider it therefore to be an excellent subspecies well 

 entitled to recognition. 



Habits and local distribution. — The pallid wood-rat is usually found 

 about streams and springs, often in the fringe of cottonwood and wil- 

 low growth along rivers. A female taken at Fort Hancock on the Rio 

 Grande contained three large young on June 24. 



Measurements of 3 specimens of Neotoma micropus canescens. 



NEOTOMA CUMULATOR Mearns. 

 COLORADO RIVER WOOD-RAT. 



Neotoma cumvlator Meaens, Proc. U. S. Nat. Mus., XX, 1897, p. 503 (advance sheet 



issued Mar. 5, 1897; original description). — Miller and Rehn, Proc. Best. 



Soc Nat. Hist., XXX, No. 1, Dec. 27, 1901, p. 103 (Syst. Results Study N. Am. 



Mara, to close of 1900). 

 [Neotoma] eumuiator, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 154 (Synop. Mam. 



N. Am.); IV, 1904, p. 280 (Mam. Mid. Am.). 



Type-locality. — Old Fort Yuma, San Diego County, California. 

 (Type, skin and skull. Cat. No. 60348, U. S. National Museum.) 



