in which he heard a Blackbird cackle as a hen does after laying. This species pairs and breeds very early in the spring, generally choosing the centre of some thick bush in which to fix and conceal the nest. The exterior is formed of coarse roots and strong bents of grass, plastered over and interlaced with dirt on the inner surface, thus forming a stiff wall; it is then lined with fine grass. The eggs are four or five, sometimes six in number, of a light blue, speckled and spotted with pale reddish brown (see Fig. 13, Coloured Plate XVI.) Occasionally they are of an uniform blue shade. Their length is one inch and two lines, and their breadth eight lines. The first brood is hatched by the end of March, or early in April. [Illustration: THE MOCKING BIRD (_Mimus polyglottus_).] * * * * * The MOCKING THRUSHES (_Mimi_) constitute a family nearly allied to the birds above described. They are recognisable by their slender bodies, and short but strong wings, that only extend as far as the base of the long tail, and have the third, fourth, and fifth quills of equal length. The exterior tail-feathers are graduated, the tarsi high, the feet large and powerful, and the claws comparatively weak. The beak somewhat resembles that of the True Thrush, but is much higher and more arched; the plumage, moreover, is unusually soft and lax. Unlike the True Thrushes, the members of this group do not prefer forests or woodlands, but frequent open tracts, marshy districts, or even the sea-coast; and while some seek the retirement of the most isolated situations, others make their home close to the dwellings of man. Such species as inhabit the southern portions of the western hemisphere do not migrate, whilst those from the north, when winter approaches, wander southward as far as the United States or even Central America. All American writers speak with enthusiasm of the song of these birds; and though we are by no means inclined to allow them the superiority over their European cousins that has been claimed for them, still we are fully prepared to acknowledge that their vocal powers are eminently fascinating and remarkable. THE MIMIC THRUSH. The MIMIC THRUSH, or MOCKING BIRD (_Mimus polyglottus_), as the most celebrated species has been called, is nine and a half inches long and thirteen and a half broad; the plumage on the upper part of the body is dark grey, shaded with brown upon the brow and side of the head; the under side is brownish white; the quills and wing-covers are brownish black, and the feet dark brown. The female is browner and darker than her mate, and the white in the tail less pure. Both sexes are alike in size.