Sokolov's Dwarf

Sokolov's dwarf hamster (Cricetulus sokolovi) is a species of rodent in the hamster and vole family Cricetidae. Previously listed as a Chinese striped hamster, it has been listed as a separate species since 1988. It has a distinctive dark stripe down its back on and otherwise grey body. It is found in China and Mongolia, and lives in burrows beneath desert shrubs.

http://en.wikipedia.org/wiki/Sokolov%27s_dwarf_hamster