306 MAMMALIA OF INDIA. 
with a rufous wash ; the hairs shorter and thinner, chocolate brown at 
- the base without the short woolly under fur, which is very thick on the 
back. Feet above yellowish-tawny, like the sides” (‘Scientific Results 
of the Second Yarkand Mission’: Mammalia). 
SizE.—Head and body, 16 to 18 inches ; tail, 5 to 6 inches. Though 
this agrees in size with 4. Hemachalanus it differs considerably in colour, 
and, according to Mr. Blanford, also in the skull. There is a beautifully 
drawn and coloured plate of this marmot in the work from which I have 
just quoted ; also of A. Himalayanus and A. caudatus, 
No. 314. ARCTOMYS DICHROUS. 
Hapsirat.—Afghanistan ; mountainous country north of Cabul. 
DESCRIPTION.—Less yellow than the last, without any black on the 
back, and having the upper parts pale dull tawny, and the lower rufous 
brown. The tail concolorous with the belly, tinged here and there 
with rich rufous brown, the tip paling to nearly yellowish-brown. 
Size.—Head and body, 17 inches; tail, 62 inches.—Azderson, ‘ Ann. 
and Mag. Nat. Hist.,’ vol. xvi. 1875. 
No. 315. ARCTOMYS ROBUSTUS. 
Is a Thibetan species, described by Prof. Milne-Edwards, ‘ Recherches 
sur les Mammiferes,’ p. 309. I have not the work by me just now. 
Section II.—MYOMORPHA—RAT-LIKE RODENTS. 
The second section of the order GLIREs, containing-the following 
families—those that are not Indian being in italics :— 
Myoxidia, Lophiomyide, Muridze, Spalacidee, Geomyide, Theridomyide 
(fossil), Dipodidee. 
The molar dentition is from ee to 6-6 
6-6’ 
number ; the tibia and fibula are united for at least a third of their 
length; the zygomatic arch is slender, and the malar process rarely 
extends so far forwards as in the preceding section, and is generally 
supported below by a continuation of the maxillary zygomatic process ; 
the collar-bones are perfect (except in Lophiomyide). Upper lip cleft ; 
the muffle small and naked; tail cylindrical, sometimes hairy, but 
commonly covered with scales arranged in rings. 
In all the Indian mammalogy this section is probably the most 
difficult to write about. Our knowledge of the smaller rodents is 
the former being the usual 
