326 MamMALIA OF INDIA. 
locusts. In both 1857 and 1858 the Karens on the mountains west of 
the city lost all their crops from this pest.” They seem to migrate in 
swarms, and cross rivers by swimming. Mr. Cross captured one out of 
a pair he observed swimming the Tenasserim river at a place where it is 
more than a quarter of a mile wide. J. Berdmore is the same as this 
species, 
The following three are Burmese rats collected by Dr. Anderson 
during the Yunnan Expedition, and are new species named by him :— 
No. 336. Mus SLADENI. 
Sladen’s Rat. 
Hapitat.—Kakhyen hills ; Ponsee at 3500 feet. 
DEscripTion.—Head rather elongated ; snout somewhat elongate ; 
muzzle rather deep; ears large and rounded, sparsely clad with short 
hairs ; feet well developed, hinder ones rather strong ; claws moderately 
long and sharp; the feet pads markedly developed, indicating an 
arboreal habit of life ; tail slightly exceeding length of head and body, 
coarsely ringed, there being three rings to each one-tenth of an inch ; 
the hairs sparse and brown ; general colour of upper surface reddish- 
brown, more rufous than brownish, palest on the head, many hairs with 
broad yellow tips ; cheeks greyish-rufous; chin, throat, and chest 
whitish, also the remaining under-parts, but with a tinge of yellowish; 
ears and tail pale brownish. (Abridged from Anderson’s ‘ Anat. and Zool. 
Res.’ p. 305.) 
S1zE.—Head and body of one, about 6°30 inches ; tail, 7°20 inches. 
Dr. Anderson says this species is closely allied to Hodgson’s JZus 
nitidus, but its skull is less elongated, with a shorter facial portion, 
with very much shorter nasals, and with a more abruptly defined 
frontal contraction than either in AZ. 2ztidus or ML. rufescens so called. 
He adds that this appears to be both a tree and a house rat. 
No. 337. MUS RUBRICOSA. 
The Small Red Rat of the Kakhyen Fills. 
Hasirat.—Kakhyen hills and the Burmo-Chinese frontier at Ponsee, 
and in the houses of the Shan Chinese at Hotha. 
DESCRIPTION.—“ Snout moderately pointed and long; ears small, 
and somewhat pointed ; hind foot long and narrow; claws moderately 
long, compressed and sharply pointed ; upper surface dark rusty brown, 
darkest on the middle and back, and palest on the muzzle, head and 
shoulder; on the sides and lower part of shoulder the reddish brown 
tends to pass into greyish; feet greyish; the sides of the snout greyish ; 
all the under-parts silvery grey tending to white, without any trace of 
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