Holböll, in his paper on the fauna of Greenland, is of the opinion that the individuals of this species that occur there come from Europe, make their journey across the Atlantic without touching at Iceland, and arrive in South Greenland as early in the season as it does at the former place, the first of May. It reaches Godhaven a month later, at times when all is snowbound and the warmth has not yet released the insects on which it feeds. It is found as far north as the 73d parallel, and even beyond. In September it puts on its winter dress and departs. Mr. Dall states that several large flocks of this species were seen at Nulato, May 23 and 24, 1868, and a number of specimens obtained. They were said to be abundant on the dry stony hill-tops, but were rare along the river. The Wheat-ear is one of the most common birds of Europe, and is found, at different seasons, throughout that continent as well as in a large portion of Western Asia. It breeds throughout the British Islands as well as in the whole of Northern Europe and Asia. Its food is principally worms and insects, the latter of which it takes upon the wing, in the manner of a fly-catcher. The male bird is said to sing prettily, but not loudly, warbling even when on the wing, and hovering over its nest or over its partner. In confinement its song is continued by night as well as by day. The Wheat-ear begins to make its nest in April, usually concealing it in some deep recess beneath a huge stone, and often far beyond the reach of the arm. Sometimes it is placed in old walls, and is usually large and rudely constructed, made of dried bents, scraps of shreds, feathers, and rubbish collected about the huts, generally containing four pale blue eggs, uniform in color, and without spots, which measure .81 of an inch in length by .69 in breadth. GENUS SIALIA, SWAINSON. _Sialia_, SWAINSON, Zoöl. Jour. III, Sept. 1827, 173. (Type _Motacilla sialis_, L.) [Line drawing: _Sialia sialis._ 1289] GEN. CHAR. Bill short, stout, broader than high at the base, then compressed; slightly notched at tip. Rictus with short bristles. Tarsi not longer than the middle toe. Claws considerably curved. Wings much longer than the tail; the first primary spurious, not one fourth the longest. Tail moderate; slightly forked. Eggs plain blue. Nest in holes. The species of this genus are all well marked, and adult males are easily distinguishable. In all, blue forms a prominent feature. Three well-marked species are known, with a fourth less distinct. The females are duller in color than the males. The young are spotted and streaked with white. Synopsis of Species. COMMON CHARACTERS. Rich blue above, duller in the female. Beneath reddish or blue in the male, reddish or light drab in the female. Young with wings and tails only blue, the head and anterior parts of body with numerous whitish spots. A. _Breast reddish, or chestnut._