A NEW FLYING-SQUIRREL FROM SIAM. 35 



Remarlcs. This is a race of flying-squirrel having, like P. 

 annamensis and P. taiilori, the external side of the ear, i.e., that nearest 

 the crown of the head, clad in front (proectote) with short white hair, 

 and posteriori}' (metectote) with long black hairs. 



From those three, P. cinereus and P. candidtdus are disting- 

 nished by having no black hairs behind the ears, while in P. li/lei and 

 P. I. vennimji the proectote is clad with rufous- hairs. I should tiiere- 

 fore group as follows : — 



Ears variably rufous throughout... cinereus and candidulus^ 



Ears rufous and black liilei and I. venniwji 



Ears white and black amiamensis, taijlori and 



a. harroni 



The skin from Pitsanulok is in good condition except that it 

 lacks the tail. It only differs from the Hup Bon example in being of a 

 little deeper shade and somewhat more widely grisszled above, but the 

 latter feature is due to the fact that the pelage of the type is somewhat 

 abraded across the shoulders and rump. The total length is recorded 

 by the collector as 38 inches ; the length of the tail as 21 inches. It 

 is a female with three pairs of mammae. Tlie skull is missing. 



Mr. Barron has more recently sent me a young male of this 

 squirrel which, it is most interesting to note, difTers from the adult in that 

 the back, instead of being hoary, is overlaid with black. The head and 

 shoulders, upper side of limbs and membranes are as in the adult, but 

 there are small red-brown patches above and below the dark eye-ring, 

 and the membranes are edged with black externally to the white. The 

 limbs and feet are more intensely and extensively black, and the black 

 patches behind the ears are continued backwards to form an indistinct 

 collar on the neck, behind which the whole of the body fur is black- 

 tipped with the central portion of the hairs rufous-white. The 

 black-tipped hairs are continued over the basal fourth of the tail which is 

 next fulvous-white and then tawny with the last inch or so black above : 



5 Four specimens of ciDfren/; fnnu Arakaii examined seem to li.ive the 

 proectote rufous ; and tliough Wrougliton slates that this area is wiiite in 

 r<ni(//r/H/(/.s (.lourn. B<imlia.v"Nat Hist. Soc. ; XX (1911) p. 1022) this is not 

 borne out by si.\ examples from Assam in which it is also rul'ous. 



VOL. II, JUNE 11116. 



