With hind toe raised. Seven genera (sixty-two species), distinguished as under with— (i.) Ten tail-feathers, hidden by the upper tail-coverts.
The genus Tinamus, with tarsus rough behind, toes short, ten species, varying from 15"-21", and ranging from Mexico to Peru and Paraguay.
The genus Nothocercus, with toes, especially the middle one, long. Five species, varying from 12"-16 1/2". C. and N. of S. America.
The genus Crypturus, with tarsus smooth behind. Twenty-nine species, varying from 9"-13".. N. Mexico to Peru and Argentina.
(ii.) Tail-feathers rudimentary, and mixed with upper tail-coverts. Bill round, and tapering to a point
The germs Rhynchotus, hind toe rather long. Primaries uniform, rufous. Two species varying from 14"-17". Brazil and Bolivia to Argentina.
The genus Nothoprocta, hind toe short. Primaries not uniform, rufous. Eight species varying from 9 1/2"-13 1/2". Ecuador to Chili and Argentina.
Bill almost straight and not tapering.
The genus Nothura, with upper tail-coverts not very long. Seven species, varying from 7 1/2//- 11". S. Brazil and Bolivia to Patagonia.
The genus Taoniscus, with upper tail-coverts very long and abundant. One species, 6", Paraguay and S. Brazil.