210 Records of the Indian Museum. [YoL. X\ , 



b. griseimanus leucopus (Gray). 



Ann. Mag. Nal. Hist., (3), XX, p. 282 (1867). 



Typiccd locaUtij. — Cochin China. 

 Type. — In British Museum. 



9305-7. Coshia Chiua (.Julien) [0.] ; Mus. Hist. Nat., Paris [E.] ; skins and one 

 skull. 



c. griseimanus vassali (Bonh.). 



p. Z. S., 1907, p. 9. 



Typical locality. — Ninh Hoa, Annam. 



Type. — In British Museum. 



The relationship and pelage of this species, which is rare in collec- 

 tions, are by no means properly understood. It is by no means im- 

 probable that all three forms have one pelage in which the undersurface 

 is more or less chestnut and another in which it is buff. The forms as 

 named from such widely separated localities may nevertheless be ex- 

 pected to prove separable. 



Callosciurus prevosti. 



In view of the fact that there is an almost complete gradation from 

 foi'nis with a broad white stripe from nose to hip to others with no stripe 

 at all, we have considered it more correct to regard all the races here 

 listed as merely subspecies, though there is apparently a far greater 

 difference between those occupying the extremes of the series, as for 

 example Sc. prevosti j^revosti and Sc. p. 2)luto. than there is between 

 many others generally regarded as perfectly distinct species. More- 

 over, the arrangement has the practical convenience of bringing to the 

 notice of the student at a glance what races have been described, where- 

 as the use of binomial nomenclature such as is adopted by Miller and 

 Lyon causes an unnecessary amount of labour in searching the literature. 

 So far as is known the large majority of forms in this group undergo 

 no seasonal change of pelage nor does the pelage of the young differ 

 materially from that of the adult, though Anderson in his monograph 

 of the genus states the contrary. As with Ratufa, however, the pelage 

 bleaches considerably generally on the back and tail, thereby occasion- 

 ally obscuring differential characters. As a rule, however, there is little 

 difficulty in determining the race to which a specimen should be as- 

 signed, the characters within the local limits being fairly constant, 

 though in the case of the Bornean forms there appears to be some 

 intergradation. 



a. prevosti prevosti (Desm.). 



McDiuii., p. 335 (1822). 



Typical locality. — Settlement of Malacca, Malay Peninsula. 

 Type.— In Mus. Hist. Nat., Paris. 



^ Nyalas, Malacca, 24th October, 1910 ; Federated Malay States Museum [P.] ; 



skin and skull. 

 3653. Malacca (E. R. Alston) [P.] ; skin. 

 9658. Malacca (A. Charlton) [C] ; skin and skull. 

 9659 (A. S. B.). Malacca (Revd. R. W. G. Frith) [('.] ; skin and skull. 

 2948 (A, S. B.). 9 Menagerie specimen (W. Rutledgc) [P.] ; skin and skull. 



