54 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 



The specimens recorded from Gondokoro and Hoima ^ by Heller 

 at the time of the description of this species have now been referred 

 to Dendromus ruddi Wroughton. One of the Rhino Camp specimens 

 proves to belong with the same species. This removes from the 

 series all the specimens with the dorsal stripe obsolete, but there is 

 still considerable variation in the distinctness of this stripe in lineatus 

 although most of the adult specimens have it well pronounced. 



The three forms of this little group of tree mice, ocliropus, acrseus, 

 and lineatus, are closely related and are probably intergrading 

 subspecies. The most southern of the three, ochropus, is the largest, 

 with largest skull and teeth; acrseus is medium sized and intermediate 

 in color of the underparts as well as in distribution; lineatus is the 

 smallest. For detailed measurements of specimens see page 53. 



DENDROMUS NIGRIFRONS NIGRIFRONS True. 



Plate 17. 



1892. Dendromys nignfrons True, Proc. U. S. Nat. Mus., vol. 15, p. 462. October 

 26. (Mount Kilimanjaro, German East Africa; type in U. S. Nat. Mus.) 



1909. Dendromys nigrifrons LyoN and Osgood, Bull. 62, U. S. Nat. Mus., p. 



158. January 28. 



1910. ?Dendroviys nigrofrons Roosevelt, African Game Trails, Amer. ed., p. 477; 



London ed., pp. 488, 489. 



Specimens. — -Six, from localities as follows: 



British East Africa: Kijabe, 1 (Loring). 



German East Africa: Mount Kilimanjaro, 5, including 2 in 

 alcohol (Abbott). 



The three skins from Kilimanjaro were collected at 5,000 feet. The 

 type is in alcohol, with skull removed. It is uncertain to which 

 form of Dendromus the interesting notes published by Colonel Roose- 

 velt at the above reference pertain, as no specimens of the genus were 

 preserved b}^ members of the expedition from Athi Plains or from the 

 Sotik, the two localities mentioned. 



DENDROMUS NIGRIFRONS SPECTABILIS Heller. 



Plate 17. 



1911. Dendromus spectabilis Heller, Smithsonian Misc. Coll., vol. 56, No. 17, 



p. 3. February 28. (Rhino Camp, Lado Enclave; type in U. S. 

 Nat. Mus.) 



Specimens. — Fourteen, from the following localities: 



Lado: Rhino Camp, 13, including 4 in alcohol (Loring, Mearns). 



Uganda: Butiaba, 1 (Heller). 



This form is very much like typical nigrifrons, but has the under- 

 parts less buffy. I can see no difference in the color of the feet in 

 the two forms. 



' The specimen is labeled "Kajuia." 



