166 Fretp Museum oF Natura History — Zoé.oey, Vo. X. 
Characters— A relatively small Phyllotis with a rather long tail, 
small ears, and a slender elongate skull. Color about as in P. andium; 
upper parts pale clay color mixed with dusky and toned somewhat by 
the slaty under color in a specimen not very heavily pelaged; under 
parts dull white tinged with creamy; feet white; tail bicolor; ears 
buffish gray. Skull small and slender; nasals long; interorbital space 
contracted; frontals relatively narrow posteriorly; supraorbital edges 
slightly rounded, not sharply-edged as in P. amicus; braincase shallow; 
interparietal distinctly angled posteriorly; teeth about equal in size 
to those of P. amicus; audital bulle smaller. 
Measurements.— Type: Total length 217; head and body gg; tail © 
118; hind foot 24; ear from notch (dry) 16. Skull of typer Greatest 
length 25.6; basilar length 20; zygomatic breadth 12.8; interorbital 
constriction 3.8; greatest dorsal breadth of parieto-frontal suture 6.7; 
depth of braincase including audital bulle 8.5; interparietal 8.8 x 2.7; 
nasals 10.3 x 2.8; palatine foramina 6.2; diastema 7; upper toothrow 4.1. 
Remarks.— The type of this species was obtained at the same locality 
as the peculiar Oryzomys polius. It is smaller than P. andium and P. 
haggardi and scarcely exceeds P. amicus from which its small ears readily 
distinguish it. Possibly its nearest relative is Phyllotts elegantulus' 
the type of which is supposed to be from Pallatanga, Ecuador, and, 
although described recently, was collected more than 50 years ago. It 
is evident, however, that even if liberal allowance be made for the 
unreliability of measurements taken from an old alcoholic specimen, 
P. elegantulus is still smaller than the species here described, the tail 
length being given as 70 and the hind foot as 21. 
Phyllotis amicus Thomas. 
Seven specimens, Menocucho. 
This small series was obtained among rocks and thorny bushes a few 
rods beyond the canefields and irrigated areas. Average measurements 
of five adults are: Total length 191 (182-198); head and body 82 (74- 
87); tail 107 (100-112); hind foot (c. u.) 22.2 (22-23); ear from notch 
(dry) 19.5 (18.5—21). 
Eligmodontia sorella Thomas. 
Two specimens from an elevation of about 11,000 feet in the moun- 
tains directly northeast of Otuzco agree closely with the description of 
this species except that their skulls have slightly larger dimensions than 
! Thomas, Ann. & Mag. Nat. Hist., (8), XI, p. 139, 1913. 
