UAKARI (Ouakari)  , the native name of certain tropical American monkeys, distinguished from all other New World monkeys by their short tails . The three known species constitute the genus Uacaria (or Cothurus) of zoologists, and are con-fined to the forests of Amazonia and the neighbourhood . One of them (U. calva) is remarkable for its long, silky, pale chestnut fur and brilliant scarlet face, which is naked (see PRIMATES) .