36 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



Order RODENTIA 



Family SCIURIDAE 



Genus MARMOTA Blumenbach 



The Asiatic marmots are in a condition far from orderly and but 

 little can be done with them until much material has been studied. 



MARMOTA BOBAC SIBIRICA (Bnchner) 



Airctomys) 1)0l)ac var. siMrica Buchner, Mamm. Przewalski, 1888, p. 39 

 (south Russia). 



Specimens. — Four skulls without skins from north Urga, Mongolia. 



MARMOTA CENTRALIS (Thomas) 



Arctomys centralis Thomas, Ann. Mag. Nat. Hist., ser. 8. vol. 3, 1909, p. 280 

 (Mt. Borochoro, northern Sinkiang). 



/Specimen. — One from near the Kobdo River, Mongolia. 



This example was so identified by the late N. Hollister. It matches 

 the description of centralis but no attempt is made to pass upon the 

 relationship of this form. 



MARMOTA HIMALAYANA HIMALAYANA (Hodgson) 



Arctomys himalayanus Hodgson, Journ. Asiatic Soc. Bengal., vol. 10, 1841, p. 

 777 (Tibet). 



SpeciTnen. — One from Dytschyu (=Dzachu?), Tibet. 

 This single specimen is comparable in every way with the lighter 

 examples of a series from Ladak. 



MARMOTA HIMALAYANA ROBUSTA (MUne-Edwards) 



Arctomys robusta Milne-Edvfards, Nouv. Arch. Mus., vol. 7, 1870, p. 92 

 (Muping, Szechwan, China). 



SpecwiCThs. — Thirteen: 1 from Nganyangba, Szechwan, and the 

 remainder from Kansu as follows: Taochow, 7; 100 miles southwest 

 of Lanchow, 3; and Archuen, Minshan Mountains, 1. 



It is not known for certain that this race is distinct. G. I>I. Allen 

 (1912) followed de Winton and Styan in considering it as insepara- 

 ble from himalayana., but the latter authors did not recognize many 

 races of other genera which according to present day usage are con- 

 sidered to be excellently differentiated. The material at my disposal 

 is undoubtedly representative of robusta as such and it is believed 

 that the differences shown, consisting chiefly of the greater amount 

 of black in the pelage, especially on and about the tail, are sufficient 

 for subspecific recognition. 



