Callithrix torquatus

from The Collaborative International Dictionary of English v.0.48

Macavahu \Ma`ca*va"hu\, n. (Zool.)
   A small Brazilian monkey ({Callithrix torquatus}), -- called
   also {collared teetee}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Teetee \Tee"tee\, n. [Sp. tit['i].]
   1. (Zool.) Any one of several species of small, soft-furred
      South American monkeys belonging to {Callithrix},
      {Chrysothrix}, and allied genera; as, the collared teetee
      ({Callithrix torquatus}), and the squirrel teetee
      ({Chrysothrix sciurea}). Called also {pinche}, {titi}, and
      {saimiri}. See {Squirrel monkey}, under {Squirrel}.
      [1913 Webster]

   2. (Zool.) A diving petrel of Australia ({Halodroma
      wrinatrix}).
      [1913 Webster]