XXIV. NOTES ON THE GENUS PETAURISTA, 



Pall., \\ I I II DES( RIPTIONS OF TWO 



NEW RACES. 



By II. C. Robinson, C.M.Z.S. and C. B. Kloss, F.Z.S. 



The form ol Petaurista petaurista inhabiting the mountains 

 of the extreme cast of Java is separable at a glance from that 

 found in tin- western end of the island and in the absence of 

 citation of the typical locality we "have selected the Preanger 

 Regencies as the habitat of the typical form. The eastern 

 rai e ma\ be de >i ribed as : — 



Petaurista petaurista nigricaudatus, subsp. nov. 



Type: — Adult male with slightly worn teeth (skin and 

 skull), collected at Ongop Ongop, Idjen Massif. 5,700 feet, near 

 Banjoe-wangi, East Java, on April gth, 1916, by Federated 

 Malay States Museums Collector, F.M.S. Mus. No. 323/16. 



Characters : —Differing from all other forms of the petau- 

 rista (nitidus) section in having the general colour of the tail 

 black, the sub-basal portions of the hairs ferruginous maroon ; 

 ears dark chestnut, black orbital ring extensive, feet and hands 

 black, this colour more extensive than in other forms and 

 extending along the margin oi the uropatagium. 



Colour: — Above glistening chestnut maroon, duller and 

 less maroon than in the West Javan form [P . petaurista) , head 

 and sides of the face more bay All the hairs of the upper 

 surface with black tips, most pronounced along the median 

 line : nose chin, a broad orbital ring and the vibrissae. black. 

 Hands and feet black, with little or no chestnut on the meta- 

 podials. margin of the antibrachial and interfemoral mem- 

 branes black, parachute ochraceous salmon, more rufous on 

 edge, lower surface similar. Ears dull brown, the hairs at the 

 base tipped with black, thinly clad with short black hairs on 

 the interior of the basal pan of the conch, mixed with brown- 

 ish chestnut at the tips. Tail glossy black above, the bases 

 of the hairs grey, the median area clouded with maroon, this 

 colour being more noticeable beneath: tip not noticeablj 

 blacker. 



Skull : Doc- nol apparently differ from that of /'. p. 

 melanotus from the Malay Peninsula ; teeth slightly larger. 



Measurements of the type: — Head and body, 456 (400 1 ) ; 

 tail. 462 15541: hindfoot, ;\ 76); car. 41 mm., taken in the 

 flesh by native collector. 



■ Measurements in parenthesis are those of an adult male /' / mtlano 

 tin from Lay Song Hon-;. Trang, Siamese Malay States. F M.S. Mus 

 No 1226/10. 



