The genus _Tinamus_ has ten members, _T. tao_, of South America north of Bolivia and Brazil, being greyish-olive, with slaty breast and buff abdomen, wavy blackish markings on both surfaces, black primaries, black head and neck with white spots and bands on the sides, and still whiter throat. Of the thirty or more species of _Crypturus_, _C. tataupa_, extending from Peru and Bolivia to Brazil and Argentina, is plain chestnut-brown, with blackish crown, grey cheeks, neck, and breast, whitish throat and belly, buffish flanks with black crescentic bars, red beak, and pinkish feet. It haunts dense undergrowth in forests, even near habitations, and frequently sits bent forward with its "tail" expanded over its back; its melody consists of several notes at diminishing intervals, merging into a hurried trill, which is terminated by a reiterated sound like chororó; its eggs are of a reddish chocolate-colour. _Rhynchotus rufescens_ of the same countries except Peru, the "Perdiz grande" of Argentina, which is represented in Bolivia by the similar _R. maculicollis_, is grey-brown, with blacker crown, rufous cheeks, neck, and breast, and chestnut primaries; the back being barred with whitish and black, and the flanks with brown and white. This somewhat solitary bird threads {185}the tall grasses of the Pampas like a Rail, and, if unable to escape by squatting or running, will fly for some thousand yards, and thrice repeat the effort before becoming exhausted, the rapid whirring of the pinions sounding like a vehicle driven quickly over stones. The song, as it may almost be called, consists of five or six flute-like notes, several individuals sometimes joining in chorus towards evening, when they are decidedly active. The eggs, which are dark purple, have been hatched in confinement, and attempts at naturalization have been made in Essex and Herts. _Nothoprocta_ contains eight members, _N. pentlandi_ of the Bolivian and Argentine Andes having the crown and back grey, barred with black and buff, and streaked with white, the remiges blackish and buff, the cheeks and breast grey, the throat, mid-abdomen and pectoral spots whitish, the flanks grey, black and white. Its powers of flying and running are comparatively small, and it will remain stationary for hours among stones or bushes in ravines, escaping observation by its dull hue. The note is a full-toned whistle; the food consists of seeds, fruits, and insects; the eggs are reddish-brown. Of seven species of _Nothura_, _N. maculosa_, the "Perdiz comun," found from South Brazil to Argentina, is yellowish-brown above, barred with black and streaked with whitish, the throat being white, the wings marked with fulvous, and the lower parts rusty with brown breast-spots and curved flank-bands. It is a fearless, solitary, and somewhat sluggish denizen of grassy plains, which does not avoid habitations, and may be knocked down with a whip or stone, feigning death