214 Proceedings of the Biological Society of Washington. 



Brit. India, Mammals, 1889, p. 325) gives the same, adding 

 that the lower surface of the body is gray in the Indian species. 

 In its reddish under surface and smaller size the Tonkin 

 specimen differs notably from the Indian and the Javan species, 

 while the latter is much the brightest colored above, nearly 

 cinnamon rufous of Ridgway (1886). Intergradation between 

 the Indian and the Tonkin forms may be expected. The 

 description of the latter follows: 



Harpiocephalus rufulus, sp. nov. 



Type. — Skin and skull No. 14206, M. C. Z., adult male from Lao-kai, 

 Tonkin, collected January 3, 1912. 



General Characters. — Smaller than H. harpia and H. lasyurus; duller 

 red above than the former, the ventral part of the body of the same dull 

 red as the back, not gray. 



Description.— Pelage throughout of the cottony texture characteristic 

 of the subfamily; forehead, top of head, and dorsal and ventral surface 

 of the body clothed with long woolly hairs, the extreme bases of which 

 are dark slaty, the middle three-fifths dull whitish or pale " smoke gray " 

 (Ridgway, 1880), tipped with dull red, practically " walnut brown " of 

 Ridgway; upper surface of tibia and interfemoral membrane thinly clad 

 with long hairs of the same walnut brown tint. Chin and upper throat 

 dull white. Forearms covered with short russet hairs. 



Skull. — Compared with that of H. harpia from Java, the skull is 

 strikingly smaller and more delicate, the interorbital region more 

 markedly cylindrical as viewed from above, and the sagittal crest weaker. 

 The teeth are essentially similar but slightly less massive. The inner 

 upper incisor is in contact with the canine instead of being separated 

 by a very slight space. The minute third upper molar is present on 

 both sides. 



Measurements. — No flesh measurements of the type were taken. The 

 forearm measures 44 mm. (49 in the Javan specimen); thumb (bend of 

 carpus to base of claw) 13; third finger, metacarpal 43.5 (48); first 

 phalanx 18 (21) ; tibia and hind foot 29; foot 11. The figures in paren- 

 thesis are from the Javan specimen. 



Skull: Condylobasal length 18.5 (19); palatal length 10.2 (11.2); inter- 

 orbital constriction 5.7 (5.7); lachrymal breadth 7.4 (7.5); zygomatic 

 breadth 13.2 (13.6) ; mastoid breadth 10.9 (11) ; upper cheek teeth (back 

 of m 3 to front of canine) 6.4 (6.9); lower cheek teeth (back of m 3 to 

 front of canine) 7.5 (8); point of union of lachrymal ridges to median 

 intermaxillary notch 4.5 (5.4). 



