284 



PROCEEDINGS OF THE ACADEMY OF 



[1899. 



Measurements of Microtus hlythi. 

 (In millimetres.) 



Tsokr Chumo, Ladak 



Tsokr Chumo, Ladak 



Tsokr Chumo, Ladak 



Riipchen, Rupshu, Ladak. . 



Chibra, Hanle river, Ladak. 



West side of Pognor lake, 

 Ladak 



Ooti, Rupshu, Ladak 



Tsokr Chumo, Ladak 



Tsokr Chumo, Ladak 



Tsokr Chumo, Ladak 



Tsokr Chumo, Ladak 



Rupshu, Ladak 



Rupcheu, Rupshu, Ladak. . 



Hanle district, Ljidak 



Hanle district, Ladak 



West side of Pognor lake, 

 Ladak 



Ooti, Rupshu, Ladak 



Above Tsomoriri lake, La- 

 dak 



Banks of the Hanle river, 

 Ladak 



84,049 

 84,051 



84,055 



84,044 



12 

 12 

 10 

 10.4 



21 



21.8 



23 



20 



22 



21 



20.4 



20.4 

 22 



21 



20 



11.4 11 



11 11 



11.4 11 



11 i 10. 



18.8 12.6 12 



19 1 11.4 11 



20 4 12 12 

 18' 11 10 

 20 10 10 

 18.4 10.4 10 

 18.8 11 11 



18.6 



18 



Subgenus MICROTUS Schrank. 

 1798. Microtus Schrank, Fauna Boica, i, p. 72. Type by elimination 

 Microtus terrestris Schrank := Mus arvalis Pallas. 



Dr. Abbott collected two species of the subgenus Microttis, one 

 in eastern Turkestan, the other in the Pamir, Neither has 

 hitherto been described. 



Microtus ravidulus sp. nov. 



Type adult $ (skin and skull), No. 62,159, United States 

 National Museum, collected at Okchi, valley of the Aksai (alti- 

 tude, 7000 feet), eastern Turkestan, November 7, 1893, by Dr. 

 W. L. Abbott. 



Collector's measurement. 



