474 Bulletin American Museum of Natural History. [Vol. XXII, 



above for the basal half like the back, apical half blackish strongly washed with 

 yellowish white; the hairs individually, for the basal two- thirds of the tail, are 

 olivaceous yellow ringed with black, the black annulations becoming broader 

 from the base of the hairs toward the tip; on the apical third of the tail the 

 yellowish annulations are limited to the basal half of the hairs, the subapical 

 portion being black broadly tipped with yellowish white; lower surface of tail 

 olivaceous yellow (a little more yellowish than the back), finely grizzled with 

 black, bordered laterally on the apical half by a band of black and an outer 

 fringe of yellowish white, the black band widening gradually towards the tip 

 of the tail, where the hairs become wholly black to the base, with conspicuous 

 yellowish white tips. 



Measurements (of type from skin). Total length, 450; head and body, 250; 

 tail vertebra, 200; tail to end of hairs, 215; hind foot without claws, 43, with 

 claws, 47 mm. 



Skull. Total length, 53 (occipital region imperfect); zygomatic breadth, 31; 

 interorbital breadth, 19; mastoid breadth, 22; length of nasals, 17; length of 

 upper toothrow, 10; diastema, 11.5 mm. 



Twenty-six specimens, 16 males and 10 females, all adult, collected as 

 follows: Lei-Mui-Mon, 24 specimens, Dec. 20 to Jan. 12; Liudon, i specimen, 

 March 5; Utoshi, i specimen, March 20. 



There is much variation in the extension anteriorly of the red of 

 the under parts; in a few specimens it wholly ceases at the upper 

 border of the breast, the whole foreneck, throat, and chin being gray; 

 in a few others it extends |to the throat, wholly unmixed with gray; 

 but in by far the greater part of the specimens the foreneck and throat 

 are gray more or less tinged or suffused with red. The anal region is 

 gray, and in about one specimen in three the gray extends forward 

 as a very narrow median line to the chest. The apical half of the tail 

 is black and whitish (often nearly clear white) ; in about half the speci- 

 mens the color is a patternless grizzle, but in at least a third of them 

 the outer half of the tail is distinctly annulated black and white, and 

 a strong tendency to regular bars is obvious, when the hairs are in 

 place, in most of the specimens of the series. 



The tendency to a narrow gray mesial ventral line recalls Sciurus 

 gordoni Anderson, from Upper Burma, and 5. thaiwanensis Bonhote 

 (and subspecies) of Formosa in which latter sometimes gray and 

 sometimes red prevails on the underparts. Swinhoe refers (/. c.) 

 to a Hainan specimen in which the red of the underparts is divided 

 by a broad band of gray. 



According to Mr. Swinhoe, this squirrel is a common species in 

 Hainan, both in the interior and along the coast. 



In Mr. Bonhote's paper ' On the Squirrels of the Sciurus erythrcsus 

 Group' (Ann. and Mag. Nat. Hist. (7), VI, Feb., 1901, pp. 163-167), 

 the island of Hainan is not mentioned in the list of localities cited under 



