MAMMALS OF THE MEXICAN BOUNDARY 



459 



wliitish. Foet dull soiled wliito; ears largjo, thinly haired, hrown externally, yellowish 

 hrown internally. Tail long, distinctly l)ic()lor, the upper tiiird dull lirown, the rest soiled 

 grayish white, covered with fine short hairs, which form a slight pencil at tip. 



The young are darker with less fulvous. 



In the new full coat the fulvous tint is stronger, the lateral line broader and brighter, and 

 the lower surface whiter. In worn breeding pelage the tints are all paler. 



Measurements. — Type specimen, ^ ad.: total length, 1.56; tail vertebras, 89; hind foot, 

 19; ear (from skin), 12. 



(Bull. Am. Mus. Nat. Hist., VIII, 1896, p. 235.) 



REITHRODONTOMYS FULVESCENS Allen. 



SONORAN HARVEST-MOUSE. 



Reithrodontomys mexicanns fnlvescens Allen, Bull. Am. Mus. Nat. Hist., VI, p. 319, 

 Nov. 7, 1894 (original description). 



Reithrodontomys fulvescens, Allen, Bull. Am. Mus. Nat. Hi.st., VII, p. 138, May 21, 

 1895, (10 miles south of Oposura, Sonora, Mexico); VII, Art. VI, June 29, 1895, 

 p. 235.— Miller and Reiin, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, Dec. 27, 

 1901, p. 96 (Syst. Results Study N. Am. Mam. to close of 1900). 



R[eifhrodontomys] m[e.ricnnus] fulvescens, ^hhiOT, Field Col. Mus., Zool. Ser., IV, UJ04, 

 pp. 257 and 264 (Mam. Mid. Am.). 



Type-locdliti/. — Ten miles south of Oposura, Sonora, Mexico, in the 

 valley of the Yaqui River. (Type, skin and skull, in the Ameriean 

 Museum of Natural History, New York.) 



Geogra'phicnl range. — Basin of the Yaqui River, Sonora, Mexico. 

 Lower Sonoran (and Tropical?) Zone. 



The followino; is the original description: 



Description. — Above yellowish brown, more or le.ss heavily lined with black; a bright, 

 strongly marked fulvous lateral line; below whitish, the basal two-thirds of the pelage 

 plumbeous; ears dusky externally, rusty within, well clothed with fine short hairs; tail 

 indistinctly bicolor, pale brown above, lighter below, sparsely haired, but the hairs pretty 

 thoroughly concealing the annulations; feet soiled white, heels sparsely covered as far as 

 the first tubercle with fine short hairs. 



Measurements. — Total length (type), 183 mm.; tail vertebra?, 102; hind foot, 19; ear, 14. 

 Average of three adults (2 males, 1 female): Total length, 172; tail vertebrte, 99; hind foot, 

 19.3; ear, 14.7. (Bull. Am. Mus. Nat. Hist., VI, 1894, p. 319.) 



This [species] is represented hy three adult specimens taken by Mr. 

 B. C. Condit at Oposura, Sonora, May 31 and June 1, 1894. 



REITHRODONTOMYS ARIZONENSIS Allen. 



CHIRICAHUA MOUNTAIN HARVEST-MOUSE. 



Reithrodontomys arizonensis Allen, Bull. Am. Mus. Nat. Hist., VII, p. 134, May 21, 

 1895 (original description); VII, p. 235, June 29,. 1895 (Rock Creek, Chiricahua 

 Moimtains, altitude about 8,000 feet). — Miller, and Rehn, Proc. Bost. Soc. Nat. 



