The nests, which are most numerous in June, are placed in a great variety of situations; that described by Mr. Gosse was "principally composed of silk-cotton, very closely pressed, mixed with the still more glossy cotton of an asclepias, particularly round the edge, the seeds remaining attached to some of the filaments. On the outside the whole structure is quite covered with spiders' webs, crossed and recrossed in every direction, and made to adhere by some viscous substance, evidently applied after the web was placed, probably saliva. Little bits of pale green lichen and fragments of thin laminated bark are stuck here and there on the outside, by means of the webs having been passed over them. The whole forms a very compact cup, one inch and three-quarters deep without, and one inch deep within, the sides about a quarter of an inch thick, the inner margin a little overarching, so as to narrow the opening; the total diameter at the top one inch and a half. The eggs are of a long oval form and pure white, save that when fresh the contents produce a reddish tinge, from the thinness of the shell. The above are the usual form, dimensions, and materials of the nest. Variations, however, often occur from local causes: thus, in one from a rocky situation only moss is used, and the base is prolonged to a point; one now before me is wholly composed of pure silk-cotton, bound profusely with the finest web, undistinguishable except on the closest examination, not a fragment of lichen mars the beautiful uniformity of its appearance; others are studded all over with lichens, and have a peculiar rustic prettiness. Insects constitute the principal food of this species, which obtains them from the flower-cups, and also catches them whilst on the wing." * * * * * The WOOD-NYMPHS (_Lampornis_) possess a straight or moderately-curved beak, which is broad at its base and incised at its extremity; the long toes are armed with short, high, and very decidedly-hooked claws; the wings are slender, and the tail broad, rounded or slightly incised at its extremity. The sexes vary considerably in their coloration. THE MANGO HUMMING BIRD.