90 Messrs. II. C. Robinson and C. Boden Kloss on 



Specimens e.ramined. — Three from the type-locality ; one 

 from Arbrc Broye, 5100 ft., tlirec from Dalat, 4500 tt., and 

 tjvo from Dran, 3000 ft., Lani^bian Mountains. 



liemarkx. — The general colour and i)attcrn of this animal, 

 except for the heavy buff mantle, are those of the Javan and 

 Continental black-and-tan s([uirrels ; the yellow back allies 

 it specially to the typical bicolor, while in the black tail it is 

 like other mainland forms. It emphatically shows that the 

 latter are only sul)species of Ratufa hicolor. 



The larf2:est example obtained has a skull length and 

 breadth of 79 and 50 mm. rt-speetively. 



(Named after mv companion in Annani, Ur. jNIalcolni 

 Smith, C.B.K.) 



For measurements see table on p. 93. 



5. Callosciurus ferrugineus ivilliamsoni, subsp. u. 



Above : head and body burnt-sienna to orange-rufous ; a 

 few black-tipped hairs on the head and ears, but nowhere 

 any grizzled areas. Feet like limits. Base of fur on body 

 and limbs blackish. 



Chin and sides of neck ochraceous orange ; remaining 

 under parts orange-rufous washed with bay to deep bay 

 sharply margined from the colour of the sides, etc. Even 

 in the palest-bellied examples tiie margination can be traced. 

 Genital region partly orange-rufous. Tail with proximal 

 half bay to chestnut, but the hairs at their bases and the 

 whole of the distal part of the tail ochraceous orange. 



Type. — Adult female (skin and skull) obtained at Kliet 

 Don Ileing, northern bank of the Mekong just below Xieng 

 Khan on tlie Paklai loop, on 31st January, 1920, by H. C. 

 Robinson and C. Boden Kloss's collector. No. 7183/S. 



The type is an intermediate example : the extremes 

 descril)ed above are a male and female, Nos. 7188 and 

 7191/S from Ban Na Tung, north bank of the Mekong just 

 below Vien Chan (Vien Tian), on 8th February, 1920. 



Specimens examined. — Seventeen from the north bank of 

 the Mekong River between Muang Liep, hit. 18° 1-1' N., and 

 Ban Manao, long. lOl'E., a little south oE the mouth of the 

 Pak Sa tributary. 



6. Callosciurus ferruc/ineus herberti, subsp. n. 



A good deal of black on the feet and tail ; chin, outer 

 sides of head, neck, and limbs grizzled olivaceous. . 



