i6 Field Museum of Natural History — Zoology, Vol. X. 



feet white, tarsal joint dusky; tail brownish drab above, slightly paler 

 below and finely vermiculated with whitish, certain white-tipped 

 hairs of the under side sometimes showing from above as a narrow 

 whitish border. 



Measurements. Type: Total length i6o; head and body 83; 

 tail vertebrae 77; hind foot (c. u., dry) 15.8; ear 14. Skull of type: 

 Greatest length 25; basilar length 18.3; zygomatic breadth 13.6; 

 interorbital constriction 3.9; nasals 8.9; postpalatal length 10.5; 

 diastema 5 ; depth from top of braincase to lower surface of audital 

 bulla 10; length of upper toothrow 2.9. 



Remarks. Comparison of the above-described form with the type 

 of parvus reveals considerable difference in cranial characters but 

 such color differences as are observable seem due to the fact that the 

 type of parvus was preserved originally in alcohol. 



The new form is named for Mr. Guy Dollman, of the British 

 Museum, who has lately devoted considerable time to a study of the 

 genus Graphiurus. 



Thamnomys oblitus sp. nov. 



Type from Voi, British East Africa. No 17123 Field Museum of 

 Natural History. Adult female. Collected April 14, 1906, by E. 

 Heller. 



Characters. Allied to Thamnomys macmillani but tail decidedly 

 longer and color somewhat deeper; skull slightly smaller. General 

 coloration much as in T. s. polionops, but slightly paler with the rump 

 more decidedly contrasted with the back, shoulders, and head. 

 Anterior upperparts from crown to middle of back clay color slightly 

 tinged with olivaceous; posterior back and rump bright ochraceous 

 scarcely modified by scattered dusky-tipped hairs; forehead, nose, 

 and sides of face olivaceous gray; underparts white distincth^ tinged 

 with strawcolor except on chin and sides of throat, all the hairs 

 with white bases ; feet pale buff, at least medially. 



Measurements. Type: Total length 286; head and body no 

 tail vertebrae 176; hind foot (c. u., dry) 22; ear 16. Skull of type 

 Greatest length 27.1; basilar length 20.5; zygomatic breadth 12.5 

 interorbital constriction 4.4; nasals 9.4; interparietal 8.7 x 4.8 

 postpalatal length 9.3; diastema 6.5; palatine sHts 5.7; length upper 

 toothrow 3.8. 



Remarks. The single specimen representing this species was by 

 chance not included with the others recently taken to the British 

 Museum for study. Therefore, no actual comparison with T. mac- 

 millani has been made, but the type of that species was carefully 

 examined and is still fresh in mind. 



