10 SMITHSONIAN MISCKIJ^ANI'.OUS COIJ,!' CTIONS VOL.56 



Characicrs. — Tail loiijj^, lenj^th eqiialin*:];' liead and bitdy or greater; 

 nasal bones slightly concave along lateral etlges ; upper parts tawny 

 ochraceous, lower parts white. 



Coloration. — Upi)er parts tawny ochraceous, sjjaringly lined by 

 black ; purer ochraceous on sides, the color extending low down on 

 sides of belly, but not sharply defined against the' white under parts ; 

 pelage made up of narrowly seal brown tipped hairs with a broad 

 band of ochraceous followed by slate to the base, the subterminal 

 ochraceous l)and giving the pelage its color character; interspersed 

 with these annulated hairs are longer black ones, which give the 

 median dorsal area a lined effect. Eyes with an ill-defined buflfy 

 ring. Kars chiefly ochraceous, with a few black hairs about the 

 base and on the inner side. Feet ochraceous. Tail with a broad 

 dorsal band of black, the sides huffy and the lower surface whitish. 

 ITndcr parts white, the hair white almost to the roots, the base ashy 

 gray; on chin, lips, throat, and thighs the hair is white to the roots. 



Mcasiirciiiciits. — Head and body, 140 mm.; tail, 150; hind foot, 

 29. Skull: condylo-incisive length, 31.5; greatest length, 35.5; 

 zygomatic breadth, 17; interorbital constriction, 5; nasals, 12.5x4; 

 length of ui)per row, 6.5; diastema, 8.2; length of palatine foram- 

 ina, 5.5 ; length of bulhe, 5.6; condylo-incisive length of mandible, 22. 



This species occurs at its type locality with rnhcsccns, both being 

 forms of the abyssiiiiciis group. T^oth forms occur about Gondo- 

 koro also. The color differences from the dark-bellied, shorter- 

 tailed rnhcsccns are marked, but the skull differences consist of only 

 average characters, such as the slight concavity to the edges of the 

 nasal bones and the lack of beading to the anterior part of the in- 

 terorbital region. 



The type locality is represented by a series of twenty- four skins 

 in which are s])ecimens of all ages, but the variation in color is very 

 little. The relationship between length of head and body and the 

 length of the tail in this series shows the following proportion: 

 tail longer than head and body, 8 specimens ; tail equal to head and 

 body, 6 specimens; tail slightly shorter than head and body, 10 

 specimens. 



LOPHUROMYS PYRRHUS. new species 



Lado IIarsh-furred Mouse 



Type from Rhino Camp, Lado Enclave; adult male, number 

 161823, U. S. Nat. ]\[us.; collected by J. Alden Loring, January 24, 

 1910; original number, 8853. 



