alcelaphus albifrons

from The Collaborative International Dictionary of English v.0.48

Blesbok \Bles"bok\, n. [D., fr. bles a white spot on the
   forehead + bok buck.] (Zool.)
   A South African antelope ({Alcelaphus albifrons}), having a
   large white spot on the forehead.
   [1913 Webster]