Feb.. 1910. New East African Mammals — Osgood. ii 



color decidedly more rufescent. Light stripes pale ochraceous buflF 

 and numbering 5-6 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 vertebrae 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 c'rs. 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 bullae. 



Measurements. Type: Total length 216; head and body 102; 

 tail vertebras 114; hind foot (c. u.) 24; ear 13. Skull of type: Great- 

 est length 27.6; basilar length 21. i; zygomatic breadth 13. i; nasals 

 II. I ; 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 bulls, and shghtly smaller molars. Upper- 

 parts dull russet brightening on the sides and face to tawn}^ ochra- 



