38 
FASCICULI MALA TENSES 
I have placed M. neglectus in the Pyctoris subgroup, as the most typical specimens certainly 
agree with the main features of that group. The series in the Museum, however, shews a wide 
range of variation, which, owing to lack of sufficient data, I have not been able to satisfactorily 
work out. Some specimens closely approach M. fiavipectus, which undoubtedly belongs to the 
Rufescens subgroup, while others with their large feet and short ears approximate to the 
Griseiventer subgroup, and it is probable that all three subgroups are represented in Borneo. 
Mus nitidusj Hodgs., which has been confounded with Mus pyctoris, is a large rat of the Mus 
griseiventer subgroup, resembling this last in the large feet and the comparatively small ears. On 
the back the type resembles M. griseiventer, except in being rather paler, the under parts being 
of a dirty yellowish-grey. Other specimens, however, from the same locality, are very much 
brighter on the back. 
Mus germaini from Cochin, China, is another species of the Griseiventer subgroup, and except 
in its more fulvous colour is not unlike M. nitidus ; the under parts, how'ever, are yellowish white 
instead of yellowish grey, and the hind feet are also whitish. 
I have not had time or material to go carefully into the Chrysocomus group, but have placed 
them together, as they may all be easily recognized by their extremely soft, woolly fur, entirely 
destitute of spines. The skulls of M. fratrorum and M. datae may be recognized by the long 
snout, flattened bullae, and large teeth. The skull of M. baluensis resembles more closely that of 
M. neglectus, but is somewhat intermediate, having the snout more attenuated and the bullae 
flatter than in the last named. 
52. Mus concolor, Blyth. 
Mus concolor, Blyth^ xxviii, p. 295 (1859) ; Flower^ P.Z.S, 1900, 
p. 361 ; Bonhote, op. cit., p. 879. 
a. 
9 
Bukit Besar, Jalor. 
loth May, 1901 
b-e. 
3 ^ . ' 9 
Biserat, Jalor. 
3rd July, 1901. 
/-<■• 
3 ^ . I 9 
Tojan, Nawngchik. 
29th Nov., 1901 
k-m. 
3 spms. in ale. 
Biserat, Jalor. 
July, 1901. 
‘ The common house mouse of the Patani States.’ 
53. Mus, sp. 
a. 9 Jeram Kawan, South Perak, 13th February, 1902. 
This mouse is apparently closely allied, if not identical, with Mus 
concolor, but is slightly larger, and owing to the size of the skull I do not feel 
justified in assigning it to that species. 
54. Rhizomys sumatrensis (Raffles) 
Mus sumatrensis, Raffles^ Trans. Linn. Soc. xiii, p. 258 (1822). 
Rhizomys erythrogenys, Anders. Zool. Res. Yunnan, p. 324 (1879). 
Rhizomys sumatrensis (Raffles), Flower, P.Z.S. 1900, p. 363 ; Bonhote, he. cit., 
p. 881. 
a, b. 9 - Kampong Jalor, Jalor. 4th November, 1901. 
c. 9 * Gedong, Batang Padang, South Perak. 12th January, 1902. 
