Chinese Striped (Dwarf or Rat Hamster)

The Chinese striped hamster (Cricetulus barabensis), also known as the striped dwarf hamster, is a species of hamster. It is distributed across Northern Asia, from southern Siberia through Mongolia and northeastern China to northern North Korea. An adult Chinese striped hamster weighs 16.7-31.0g, and has a body length of 74.2-103.6 mm with a tail of 21-36 mm. It is smaller and has a much shorter tail than the greater long-tailed hamster, Tscherskia triton, which inhabits much of the same range.

http://en.wikipedia.org/wiki/Chinese_dwarf_hamster