1014.] 



EEITHRODOJTTOMYS MEXICANUS GROUP. 



75 



Characters. — Paler and less tawny than R. m. cherrii; tail shorter. 



Color. — Upperparts varying from light ochraceous-salmon, exten- 

 sively mixed with brownish to nearly pure tawny, with sHght admix- 

 ture of brown; lateral line only faintly indicated; underparts white, 

 sometimes with a faint tinge of light buff; ears and tail dark hair- 

 brown, the latter almost unicolor, but shghtly paler beneath; feet 

 hair-brown, sometimes edged with grayish white. 



Slcull. — Very similar to that of R. m. cherrii, with short, heavy 

 rostrum, broad frontals, and short palatal foramina. 



Measurements. — Ten adults: Total length, 181 (169-190); tail 

 vertebra, 107 (98-116); hind foot, 19 (18-20). Skull: (See table, 

 p. 81). 



Remarlcs. — This species is rather closely related to R. m. cherriiy 

 from which it differs in browner, less tawny coloration and shorter 

 tail. JSTo intermediate specimens are known, but further collecting in 

 Panama may result in securing such. 



Specimens examined. — Total number, 7, from the following locali- 

 ties '} 



Colombia: Cocal, 1; El Roble (7,000 feet), 5; La Guneta, 1; Munchique, 5; San 

 Augustin, Huila (10,300 feet), 1. 



REITHRODONTOMYS SODERSTROMI Thomas. 



Ecuador Harvest Mouse. 



Reithrodontomys soderstromi Thomas, Ami. Mag. Nat. Hist., ser. 7, I, 1898, p. 451. 



Type locality. — Quito, Ecuador. 



Distribution. — Known only from the type locahty and from Valle 

 de las Papas, southern Colombia. 



Characters. — Apparently in the cherrii group and closely related 

 to miUeri; colors less tawny above and more buffy or fawn-colored 

 below; hind foot, ear, and skull larger. 



Color. — '^Dull grayish fawn, not nearl}^ so rufous as in costaricensis 

 [cherrii]. Brighter lateral line little developed. Under surface not 

 sharply defined, its color much less bright than in costaricensis, the 

 tips of the hairs more or less buffy or fawn-colored. Ears thinly 

 haired, brown, Httle darker than the general color. Hands and feet 

 white, without darker markings on the metapodials. Tail pale brown 

 above and below, the tip white. A series of 4 specimens from Valle 

 de las Papas, central Andes, Huila, Colombia,^ may be described as 

 follows: Upperparts mixed blackish brown and ochraceous-salmon; 

 ears clove-brown; tail dark mummy-brown; hind feet soiled whitish, 

 with a broad band of mum m y-br 0"\vn reaching nearly to the toes; 



1 All in Collection Am. Mus. Nat. Hist. 



2 Thomas, loc. cit. 



8 Compared by Dr. J. A. Allen and Mr. Oldfield Thomas with the type and 12 topotypes in the British 

 Museum and said to agree perfectly with them. 



