﻿4 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 59 



basilar length, 21 ; zygomatic breadth, 15.3; interorbital constriction, 

 4.5; nasals, 11.2 x 3.5; palatilar length, 8.9; palatal foramina, 3.2; 

 diastema, 6; maxillary toothrow, 3.6; condylo-incisive length of 

 mandible, 16.8; coronoid angular depth of mandible, 7.5. 



This race is confined to the forested summits of the Taita 

 Mountains. 



LOPHIOMYS THOMASI, new species 

 Uaragess Maned Rat 



Type from Mt. Gargues (Uaragess), 6000 feet altitude, Mathews 

 Range, British East Africa; adult male, number 181789, U. S. Nat. 

 Mus.; collected by Edmund Heller, September 1, 191 1; original 

 number, 4206. 



Characters. — Allied most closely to ibeanus, differing chiefly in 

 darker and more contrasting coloration ; head with median black 

 area bounded by wide white bands above eye, which are continuous 

 over forehead ; skull nearest ibeanus in shape and size but mesoptery- 

 goid fossa intermediate in size between this species and testudo, 

 size of antorbital foramen and granulation of maxillary as in ibeanus, 

 from which it differs by thicker outer walls to antorbital foramen, 

 larger masseteric knob and smaller palatal foramina. 



Coloration. — General dorsal coloration deep black, the hairs every- 

 where broadly white tipped, giving a silvery effect ; the sides some- 

 what more extensively white than the median maned area ; the short 

 haired lateral bands bordering the mane olive-drab, in marked 

 contrast to the general coloration. Head chiefly black with two 

 prominent wide white bands over eyes, which meet on forehead, 

 another large white spot below eye, setting off the black eye area 

 and the black snout ; ears hidden in the hair, blackish inside, their 

 backs and tips white. Hind and forelimbs silvered like back, the 

 toes, however, chiefly black. Underparts grayish, the hairs exten- 

 sively white tipped, the underfur smoke-gray ; chin black, the 

 throat lighter and chiefly white; tail silvered like dorsal region, 

 the extreme tip white. 



Measurements. — Head and body, 270 mm. ; tail, 165 ; hind foot, 

 41 ; ear, 26. Skull: tip of nasals to back of interparietal, 58; con- 

 dylo-incisive length, 57; basilar length, 51; zygomatic breadth, 38; 

 interorbital constriction, 14; nasals, 20.5 x 8; height of antorbital 

 foramen, 7; palatilar length, 27.5; palatal foramina, iq; maxillary 

 toothrow, 13; diastema, 14.5; length of mesopterygoid fossa, 12.5; 





