they certainly co-operate in taking care of their progeny. When the young first leave the nest they associate in flocks, and fly about the country until the autumn, the parents, in the meantime, employing themselves in rearing a second and third family. Rock Sparrows subsist principally upon insects, seeds, and berries. In Spain and Germany they are often to be seen hopping through the dirt in the streets, and in the former country are brought to market spitted upon a stick. They are easily obtained by the help of nets or limed twigs, but are so wary that it is difficult to bring them down with a gun. In spite of its shyness this species is very well adapted for the cage, and will become so tame as to take its food out of the hand of its master. * * * * * The HAWFINCHES (_Coccothraustæ_) have usually been classed amongst the true Finches (_Fringillæ_), but in our opinion they should be regarded as the type of a peculiar family. The birds belonging to this group are recognisable by their compact body, long wings, comparatively short tail, short, powerful legs, and above all by their strong, rounded, thick, and pointed beak, furnished with a longitudinal groove within the upper mandible, behind which there is a transverse ridge, placed directly above a corresponding depression in the lower mandible, surrounded by a thickened margin. The plumage is rich, somewhat lax, and, though striking, not brightly coloured. The members of this group are found in all parts of the world--indeed, some species are extremely numerous, but our knowledge of their mode of life and habits is but limited. THE GREEN GROSBEAK. The GREEN GROSBEAK (_Chloris hortensis_), or GREENFINCH, as it is generally called, must be regarded as forming, as it were, a bond of connection between the present family and the Goldfinches. This bird has a strong conical beak, somewhat compressed at its edges, with a small ball-like elevation in the interior of the upper mandible. The feet are longer than those of the true Hawfinch, and the body elongated, but powerful. The plumage is principally of a green colour, that of the male being olive-green on the upper part of the body, the lower portion greenish yellow, the wings ash-grey, the tail black, the anterior quill-feathers of the wings and the five exterior tail-quills beautifully marked with yellow. The beak is of a yellowish flesh colour, and the eye brown. The plumage of the male is duller during the winter, owing to the grey with which the feathers are then bordered. The coat of the females never loses this sombre tint: the young are distinguishable by the dark streaks upon their bodies both above and below.