376 Messrs. H. C. Robinson and C. Boden Kloss on 



tened tlian in either R. s. sahanus or R. s. vocrferans. Inter- 

 parietal semielliptie, the length one-half the breadth. 



Measurements. — Head and body (taken in the flesh) 251 

 (242 *) mm. ; tail 335 (358) ; hind foot 50 (49) ; ear 28 (30). 



Cranial measurements : greatest length 55*0 (56*3) ; con- 

 dylo-basilar length 48"0 (49"0) ; palatilar length 24-8 (25*0) ; 

 diastema 15*0 (14"6) ; palatal foramina length 8*0 (8'1) ; 

 greatest length of nasals 21*3 (21*6) ; zygomatic breadth 24*9 

 (25*6) ; length of upper molar row 9*4 (10*2). 



Specimens examined. — Four ; the type, an adult male from 

 Sodong Jerok, Idjen Massif, near Banjoewangi, E. Java, and 

 an immature male and female from the same locality. 



Remarks. — The entirely uniform tail in the adult will at 

 once separate this species from all other members of the 

 group, apart from the characters of the median streak on the 

 hands and feet, which may possibly not be constant. Other- 

 wise there are no very special differences. In other localities 

 as well as in Java rats of the group are not usually found 

 above about 4000 ft., being replaced in the Malay Peninsula 

 and in Sumatra by the ciliatus section, which, however, so 

 far as is at present known appears to have no representative 

 in Java or in Borneo. 



In Borneo and the Malay Peninsula rats of this group are 

 at their brightest. In outlying parts of their range (R. s. 

 herberti from Central Siam and R. s. listeri from Sikkim) 

 they become duller as in the present form and R. s. ululans 

 of Sumatra. 



Rutins hnlcit treubit, subsp. n. 



Type. — Adult male (skin and skull) collected at Tjibodas, 

 Mt. Gredeh, Western Java, 5000 ft., on 23rd February, 1916, 

 by H. C. .Robinson. Original no. 7271. 



Diagnosis. — Allied to 11. bulcit (Bonh.) from the Malay 

 Peninsula and R. fraternus (Robinson & Kloss) f from 

 Sumatra, but less spiny than the latter, tail rather shorter ; 

 always lacking the ochraceous patch on the chest, which is 

 always present in Surnatran animals. General size decidedly 

 smaller. 



Skull and teeth. — Similar to R. bukit, except in size. 



Dimensions. — Measurements of the type taken in the flesh : 

 head and body 144 mm. ; tail 187 ; hind foot 29 ; ear 20*5. 



* Measurements in parentheses are those of the adult male, F.M.S.M. 

 869/16, from Eastern Java. 



t Journ. Straits Branch Hoy. Asiat. Soc. no. 73, p. 273(1916) ; Journ. 

 F.M.S. Museums, viii. pt. 2, p. 47 (1918). 



