1695. MOUSE DEER OF RHIO-LrNGA ARCHIPELAGO— MILLER. 



TRAGULUS FLAVICOLLIS Miller. Sugi. 



General color about as in Tragulus luiescens, but nape stripe ab- 

 sent, its position barely indicated by a few dark hairs ; throat mark- 

 ings normal, the dark stripes scarcely mixed with black; size prob- 

 ably greater than in T. httescen.s: Head and body (type, not full}'^ 

 adult). 55 nun.; tail, 80; hind foot, including hoofs, 132. 



TRAGULUS PERFLAVUS Miller. Bataui, Bnlaii, Galong, Setoko (Plate 2. 

 lower rtgure). 



In general like Tragulus favicollis^ but even more yellow, the nape 

 without dark hairs; dark throat stripes clear, brownish, ochraceous- 

 buff, noticeably encroaching on area of white markings; size rather 

 large. Average and extremes of six specimens from Batam: Head 

 and body, GOS (583-635) mm.; tail, 80 (77-85) ; hind foot, including 

 hoofs, 131 (127-137). 

 TRAGULUS NIGRICOLLIS Miller. Singkep (Plate 3, upper figure). 



Back as in Tragulus pretiosus^ but more clouded with black; sides a 

 light buff much like that of T. lutescens; entire neck black, clear 

 above, sprinkled with yellowish-brown annulations at sides, especially 

 along edge of lateral white stripes; throat markings normal, the dark 

 stripes black, speckled with brown like sides of neck. Size large, aver- 

 age and extremes of five adults: Head and body, 5(50 (540-590) mm.; 

 tail, 81.4 (77-85) ; hind foot, including hoofs, 143.8 (138-148). 



TRAGULUS NIGROCINCTUS Miller. Kunder, Great Karimon (Plate 3, lower 

 figure). 



Back and sides rich and dark, essentially as in Tragulus pretiosus^ 

 but black shading heavier, almost completely obscuring the under 

 color along mid-dorsal region; neck and throat clear black, the throat 

 stripes absent ; no white on under parts, the lower side of tail yellow- 

 ish brown, a character unique among the species occurring in the 

 archipelago. Size medium, average and extremes of ten adult males 

 from Kunder: Head and body, 502 (490-520) mm.; tail, 86.5 

 (80-100) ; hind foot, including hoofs, 130 (132-142). 



The only general feature in which the insular species differ from 

 Tragulus napu is their tendency toward richer, less grayish colora- 

 tion, especially of the sides of body. In other respects they show 

 great diversity. In fact, among them are presented the extreme 

 phases of a tendency manifest throughout the ^laj^tu group for each 

 local species to assume a type of marking referable to some phase in 

 one of the two lines of variation most readily " followed in diverging 

 from the primitive type represented by the continental form. The 



" A mere inspection of the manner in whicli the colors are combined in the 

 normal pattern is sufficient to show that the two courses followed are mechan- 

 ically the most feasible; this is further shown by the fact that the not very 

 extensive individual variations in a large series of Sumatran Tj-(Hjii1iis rKipii 

 can nearly all be referred, to the earliest stages of divergence of the same 

 two lines. 



