122 TREUBIA VOL. IL, 1. 
2. Rattus concolor ephippium. 
Mus ephippium JENTINK, Notes Leyden Museum, II, 1880 p. 15 (Sumatra). 
Rattus concolor ephippium ROBINSON & KLOSS, Journ. Fed. Malay 
States Mus. VII, part 2, 1918, p. 56. 
Mus concolor DAMMERMAN, Mededeel. Lab. v. Plantenziekten, 
No. 24, 1916, pp. 3, 7—9. 
1 3 5 9 Olee Lheué, Atjeh, N. Sumatra Mammae 8 
1 S 5 9 Koetaradja 4 # > 8 
2Q Tandjong Pinang, Riouw Id, 
> & OF Singzjoore as 8 and 6 
2 d 2 2 Poeloe Toedjoeh between Singkep 
and Bangka Islands, South 
China Sea A 8 
1 2 Serasan Id, South Natoena Islands i 8 
1 2 Soekaboemi, West Java À Sr 
2 0‘ 29 Semarang, Mid Java 5 8 and 6 
1 © Tabanan, Bali ie où 
1 & juv. Laboean Hadji, Lombok 
This is a small rat with the pelage of the upper parts composed partly 
of hair, partly of flattened spines. The tail, though generally a little darker 
above than below, is dark throughout and the feet are nearly always 
white. In colour the subspecies is very variable ranging from dark brown 
to tawny brown above; and below from smoky grey to silvery white: 
frequeutly animals with paler underparts have them strongly washed with 
buff; sometimes there is a brownish stripe down the centre of chest and 
abdomen and occasionally the underparts are brownish. - The audital bullae 
are large. 
All insular Malaysian specimens that I have seen appear to belong to 
the present race. 
R. ephippium like R.r. diardi, appears to be undoubtedly a house-rat; 
for though sometimes taken in open country it seems to be so met with 
only in the neighbourhood of buildings. 
IV. Two New Rats. 
| have found the following new subspecies in the collection of rats 
belonging to the Zoological Museum at Buitenzorg. 
1. Rattus rajah hidongis subsp. nov. 
? Mus rajah MILLER, Proc. Washington Acad. Sci. III, 1901, p. 121. 
Colour as in À. rajah (THos.) and R. pellax (MILLER): differs from R. similis 
(Rob. & Kross) in having the inner sides of the limbs white continued to the feet. Skull 
with rostrum broader and less tapering than in both the former, much more so than in 
R. similis, 
