RESULTS FROM THE MAMMAL SURVEY. 645 



On the whole palmarimi and its allies do not seem to make so 

 complete a second change of colour as tristriatus, and this, if there is 

 any truth in the theory of the parasitism of •palmaruvi is perhaps 

 not to be wondered at. 



The type, and a series from Travancore, of tristriatus have been 

 in the National Collection for many years, but more recently Miss 

 Ryley established, on Survey material (Vol. XXII., p. 437, 1913), 

 a splendid new species, which she did me the honour to name after 

 myself, to this I am now able to add another form, from Helwak, 

 on the Satara Ghats. As the specimens from Kanara, however, 

 seem to be intermediate I have ranked the Helwak form as a sub- 

 species of tristriatus. 



May I here venture to appeal to members for series of these 

 Squirrels from various localities. There is almost certainly at least 

 one more distinct form of tristriatus to be found in the jungles of 

 Thana and northwards, and it would be a gTeat thing to fill up some 

 of the blanks between Mysore, Hoshaaagabad, and Hazaribagh in 

 the distribution of the members of the palmarum section of the 

 Group. 



Tlie following is a Key to the forms wdiich I now recognise : — 



Key. 



J. Skull 42 mm. or more. 



a. Size large, skull 48 mm., hindfoot 



45 mm. (Coorg) ... ... F. irrou'ihtoni, Ryley. 



h. Size medium, skull 44 mm., hind- 

 foot 40 mm. (Travancore) ... F. tristriatus, Water- 

 house, 

 c. Size small, skull 42 mm., hindfoot 



36 mm. (Satara Ghats) ... F. tridriatus numarius, 



subsp. nov. 

 B. Skull 40 mm. or less. 



a. Size larger, head and body 160 mm. 

 or more, hindfoot 40 mm. or more. 

 a. Whole ground colour suffused 

 with yellow or buff. 

 a. General colour paler. Feet 



almost white (Madras) ... F. palmarum, L. 

 h. General colour darker. Feet 



like the body (Travancore). F. palmarum comorinus, 



Wroughton. 

 h. No yellow suffusion on shoulders 

 and flanks. Feet white (Bel- 

 lary) ... ... ... ... F. palmar um, bellaricus, 



siibsp. nov. 



