Fes., 1910. New East Arrican MAMMALS—OscGoop. II 
color decidedly more rufescent. Light stripes pale ochraceous buff 
and numbering s5—6 of the heavier or primary ones and 4-5 of the 
secondary ones on each side. Four definite primary dark stripes on 
each side, each divided by a secondary light stripe. Ears bright 
cinnamon rufous; upper side of fore and hind feet ochraceous buff; 
underparts creamy buff. Skull much as in spekei but molars slightly 
smaller; larger and more elongate than in zebra and albolineatus. 
Measurements. Type: Total length 228; head and body 104; 
tail vertebre 124; hind foot (c. u.) 26; ear 14.5. Skull of type: 
Greatest length 29.9; basilar length 23.2; zygomatic breadth 13.6; 
nasals 11.2; least interorbital breadth 4.5; postpalatal length 10.7; 
diastema 6.7; palatine slits 5.8; maxillary toothrow 5.2. 
Arvicanthis barbarus albolineatus subsp. nov. 
Type from Lukenya Mountain, British East Africa. No. 17194, 
Field Museum of Natural History. Adult female. Collected De- 
cember 14, 1905, by E. Heller. 
Characters. Most similar to Arvicanthis barbarus zebra but paler 
with lighter, more whitish stripes and decidedly paler eirs. Some- 
what similar to A. b. spekei but smaller with paler stripes, paler ears, 
and smaller molars. Arrangement of stripes about as in zebra and 
convictus; light dorsal stripes pale creamy, those on the sides still 
lighter, almost white; median dark stripe extending forward beyond 
the ears; forehead and sides of face coarsely grizzled creamy; ears 
buff or cream buff instead of ochraceous or tawny as in allied forms; 
fore and hind feet buffy white. Skull with relatively short broad 
braincase, small molars, and good-sized audital bulle. ' 
Measurements. Type: Total length 216; head and body 102; 
tail vertebra 114; hind foot (c. u.) 24; ear13. Skull of type: Great- 
est length ,27.6; basilar length 21.1; zygomatic breadth 13.1; nasals 
11.1; least interorbital breadth 4.3; postpalatal length 9.3; dias- 
tema 6.5; palatine slits 5.3; maxillary toothrow 5.1. 
Mus voi sp. nov. 
Type from Voi, British East Africa. No. 17062, Field Museum 
of Natural History. Adult male. Collected April 22, 1906, by 
_E. Heller. 
Characters. Allied to Mus chrysophilus but duller in color; gen- 
eral tone of upperparts dull russet rather than bright ochraceous; 
skull with more slender nasals, lighter and narrower zygomatic plate, 
slightly smaller audital bulla, and slightly smaller molars. Upper- 
parts dull russet brightening on the sides and face to tawny ochra- 
