_Tigrornis leucolophus_ of West Africa has a narrow white crest, the neck-feathers hanging loosely down, as in _Tigrisoma_. _Zonerodius heliosylus_ of New Guinea is black above with fulvous bands, and has white bars on the wing; the rump and fore-neck are white with dusky markings, the lower parts yellowish-white. The genus _Butorides_, connecting the Bitterns and the Herons, exhibits somewhat elongated plumes on the crown, fore-neck, and scapular region. These small birds, variegated with glossy green, black, grey, and chestnut, and often streaked with white, occur chiefly in the Neotropical and Australian Regions, though _B. virescens_ at least inhabits North America and _B. atricapilla_ the Ethiopian countries. _Nycticorax_ (Night-Heron) is an almost cosmopolitan genus, remarkable for the long linear blackish or white occipital feathers, from two to ten in number, apparently lost for a time after breeding. In our occasional visitor, _N. griseus_, of the Palaearctic, Indian, and Ethiopian Regions, and the barely separable _N. naevius_ of America, the colour is greenish-black, with grey neck, rump, wings, and tail, white cheeks and lower parts. _N. leuconotus_ of the Ethiopian Region has the neck rufous, the back white, and the under surface spotted with dusky; _N._ (_Pilerodius_) _pileatus_ of tropical South America is white with black crown; _N._ (_Nycterodius_) _violaceus_ of the same districts, which extends to the United States, is plumbeous, with yellowish-white crown and black stripes above, the scapulars being somewhat decomposed; _N. pauper_, confined to the Galapagos, is very similar; _N._ (_Syrigma_) _sibilatrix_ of South Brazil, Chili, and Argentina, is grey, with blackish head and remiges, rufous markings on the face and wing-coverts, and yellowish-white breast; _N._ (_Gorsachius_) _goisagi_, ranging from India and the Malay countries to Japan, is red-brown, with buff and white lower parts, the whole plumage being marked with dusky; while _N. caledonicus_ of the Australian Region has the upper parts rich buff, the lower parts white, and only the head black. _Cancroma cochlearia_, the Boat-billed Night-Heron of South {91}America, is blue-grey with white on the forehead and neck; the head, crest, and flanks being black, and the belly cinnamon. _C. zeledoni_ of Central America differs in its reddish fore-neck.