is rufous and grey above with black blotches, the crown is blackish, the sides of the head are transversely striped with black and white, the white throat is margined with black, the lower parts are reddish-white with black chevrons. The hen-bird has a buff throat, and shews little black on the cheeks. This genus contains eight members, often called Colins, which range as far south as Mexico and Cuba. The three species of _Cyrtonyx_ extend from the Southern United States to Guatemala; they all have full crests, highly-developed wing-coverts, and very short, soft tails. The sides of the head and neck exhibit a peculiar black and white pattern, while those of the body are grey, ocellated with white or varied with chestnut. The females lack the pattern on the head. As an example, _C. montezumae_ is rufous above, barred with black, and streaked with buff and white; the breast being chiefly {232}chestnut and the abdomen black. _Dactylortyx thoracicus_ of Central America has brown upper parts, with black blotches and rufous and buff mottlings; the superciliary stripes, cheeks, and throat are chestnut, with a black patch on each side of the last; the under surface is reddish-grey with white shaft-stripes. In the hen the chestnut is replaced by whitish. The crest is not so full as in _Odontophorus_, of which some fourteen species extend from South Mexico to Bolivia and South Brazil. _O. guianensis_, ranging from Panama to Bolivia and Amazonia, has the head and throat mainly chestnut, the neck and mantle grey, the lower back reddish-brown–all except the grey portions being marked with buff and black; the mid-throat is grey, the under parts orange-brown, with dusky barring on the chest and sides. The naked orbits are reddish; the bill is black, the feet are rather lighter, as in the Sub-family generally. _Rhynchortyx spodiostethus_ of Veragua and Panama has the crown brown, the rest of the head chiefly rusty-red, the mantle grey and brown, the lower back buff relieved by grey and black, the wings more chestnut, the lower parts dark grey, with white and buff centres to the throat and breast respectively, and black-barred flanks. _R. cinctus_ of Veragua has a rufous chest and olive-brown cheeks.