East Asiatic Members of Sciurus vulgaris. 251 
Of this subspecies Mr. Thomas says :— 
“The Khingan squirrel is readily distinguishable from its 
nearest allies, S. v. colatus, the Altai form, rupestris of 
Saghalin, and orientis of Hokkaido and Korea, by its 
markedly larger size, as indicated by its skull. In colour 
also it is of a much darker grey than any of them.” 
The Khingan specimens in the British Museum are all 
large, and of a dark grey, almost blackish-grey colour, and 
are in part winter part summer pelage. They show very 
long hair, considerably longer than in winter specimens of 
any other of the East Asiatic forms. A specimen collected 
by me in the West Kirin forest, near Chao-yang Chen, 
Manchuria, in June, shows the same large size (length of 
head and body 240, tail 210 mm.) and long hair, but is of a 
slightly lighter grey, also without any rufous. A number 
of specimens taken by me in the I-mien-po district of North 
Kirin in autumn and early winter showed the pelages ranging 
from dark grey to grey with a slight brownish washing on 
the backs. ven in these there was no rufous colour in 
evidence. 
Measurements of type (B.M. no. 10.5.1. 8), a fully-adult 
female :— 
Head and body 250 mm. ; tail 205 ; hind foot 61 ; ear 30. 
Skull: greatest length 57; basilar length 43; length of 
true molar series 7°2. 
Range. The Amur, Sungari, and Ussuri basins, in the 
Amur and Primorsk provinces of East Siberia, and Chinese 
Manchuria excluding the Yalu basin. 
3. Sciurus vulgaris rupestris, Thomas. 
Proe. Zool. Soc. Lond, 1907 (April), pp. 410-411. 
Type-locality. Dariné, 25 miles north-west of Korsakoff, 
Sagbaun Island. 
In this form melanism is predominant. It is smaller than 
orientis, and much less. rufous in both summer and winter. 
Frequently in summer the pelages are entirely black on the 
upper parts, legs, and tail, the belly, chest, throat, and even 
chin being pure white; while in those specimens, in which 
there is rutous colouring it is either fairly universally distri- 
buted or occurs only on the back and about the ears. In black 
specimens there is no sign of rufous on the legs and flanks, 
as there is in chdliensis. In winter-skins the colourtis greyer 
with no rufous on the back, only a little about the ears. 
This form is the smallest of the subspecies found in these 
regions. 
Measurements of (1) type (B.M. no. 7, 2. 5. 26), a slightly 
