DE LATTREI'S SABRE-WING (_Campylopterus hemileucurus_ or _Campylopterus De Lattrei_) is of a deep blueish black on the head; the wing-covers, back, and rump are green; the quills dark purplish brown; the tail-feathers blueish black, shaded with green; a small white spot is placed above the dark eye; the beak is black, the foot dark brown. The head of the female is bronze-colour, the rest of the mantle glossy green, with a golden shade; the region of the throat and sides of the breast are greenish blue, and the under side grey, with a greenish gloss. This gaily-tinted bird inhabits Mexico and Central America. "Of all the members of the genus," says Gould, "this species is by far the largest and the most beautifully coloured. It is said to be the boldest of its race, and to be so extremely pugnacious that every bird venturing into the neighbourhood of its territory is furiously attacked and driven away. This peculiar feature in the habits of the race explains the use of the broad and powerful shafts of the primaries, which form so conspicuous a character in the males of the _Campylopterus_. This bird is strictly a Mexican or Central American species. M. de Lattrei, to whom we are indebted for its discovery, states that it is found in the forests of Jalapa during two months of the year only, that it is known by the name of the 'Luce-fleur-royal,' and that it feeds during the entire day, instead of during any particular hours. He adds that it selects a flowering shrub, which it never quits, and from which it chases with anger all the species of the family that may seem desirous of approaching it. On taking flight it utters a cry." "The large showy tail of this Humming Bird," says Mr. Salvin, "makes it one of the most conspicuous when on the wing. The females are especially abundant, their ratio to the males being as five to two."