The Collaborative International Dictionary of English v.0.48:

Bechuanas \Bech`u*a"nas\, n. pl.
   A division of the Bantus, dwelling between the Orange and
   Zambezi rivers, supposed to be the most ancient Bantu
   population of South Africa. They are divided into totemic
   clans; they are intelligent and progressive.
   [Webster 1913 Suppl.]