578 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



Specimens examined. — Five females and 1 male, all from the island 

 of Banka, as follows: Klabat Baj", 3; Tanjong Bedaan, 1; Tanjong 

 Tedong, 1; Tanjong Rengsam, 1. 



Rernarl's. — The series of Tragidus hancaniis is very uniform in color. 

 Two of the specimens have the black tips of the hairs worn off, and 

 are consequentl}^ lighter than the others. It is most closely related 

 to T. napu, from which it differs in its brightei- color. It differs in 

 the same respect from T. canescens of the Malay Peninsula, as well as 

 in its slightly smaller size. 



TRAGULUS BILLITONUS, new species. 



1891. Tragidus napu, melani^tic variety, Jentink, Notes Leyden Museum, XIII, 



1891, p. 209. 

 1905. Tragulus napu Willink, Natuurkundig Tijdsclirift Nederlandach-Indie, 



XLV, p. 198. 



Ti/pe. --Adnh male, skin and skull, Cat. No. 124929, LI. S.N. M., col- 

 lected at Tanjong Batu, Billiton Island, east of Sumatra, Jnlj 20, 

 1904, by Dr. W. L. Abbott. Original number 3521. 



Diagnostic cliaracters. — A member of the Tragulus napu group, 

 related to T. pretieUus and T. umhrinns, but darker and duller in color 

 than the former, lacking the bright color along the sides of the body, 

 neck, and head, and not quite so dark as the latter, and with a well- 

 defined nape stripe instead of the diffused dark color of the neck in 

 umhrinus. 



Color. — Type: General color of hairs above tawny-ochraceous, but 

 heavily tipped with black, the latter color predominating in the gen- 

 eral effect. On the sides the tawn3^-ochraceous is replaced by buff' and 

 the black tips to the hairs are less conspicuous. Top and sides of head 

 and neck similar iii color to the back, but black tips to the hairs less 

 conspicuous except along the rather narrow nape stripe. Under parts 

 white in region of chest and groin, but the middle of the belly, for an 

 extent of 150 mm., is suff'used with ochraceous buff'. Throat pattern 

 normal, the hairs a somewhat duller tawnj^-ochraceous than the back 

 and heavily tipped with black so that the latter color predominates. 

 Hairs of collar lighter in color, approaching ochraceous buff', with 

 l)lack tips, both colors equally prominent. Foreleg generally tawny- 

 ochraceous, without uuich admixture of black. A narrow, white line 

 extends on the inner side of the leg from the wrist upward to meet the 

 white of the chest. Hind leg similar to foreleg in color, but generally 

 darker and with more white on the imier side. Upper surface of tail 

 similar to back, but ))lack of hairs not so conspicuous. Tip and under- 

 side of tail white. Ears, orbital ring, preorbital stripe, nose and lips 

 blackish. 



Sku/l and teeth. — Apparentl}^ there are no characters by which to 

 distinguish the skull of Tragulus biUitonus from that of related species. 



