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. 



Remarks. — 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 <;/'■>' specimens <>f Neotoma micropus canescens. 



NEOTOMA CUMULATOR Mearns. 

 COLORADO RIVER WOOD RAT. 



Neotoma cumutator Mearns, Proc. V . S. Nat. Mus., XX, 1X97, p. 503 (advance sheel 



issued Mar. ">, 1897; original description). Miller and Rehn, Proc. Bust. 



Soc Nat. Hist., KXX,No. 1. Dec.27, L901,p. 103 (Syst. Results Study N.Am. 



Mam. to close .>!' L900). 

 [Neotoma] cumulator, Elliot, Field Col. Mus.,Zool. Ser., II. L901, 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 J 



