Mr. Dall states that these Blackbirds arrive at Nulato about May 20, where they are tolerably abundant and very tame. They breed later than some other birds, and had not begun to lay before he left, the last of May. Eggs were procured at Fort Yukon by Mr. Lockhart, and at Sitka by Mr. Bischoff. Besides these localities, this bird was found breeding in the Barren Grounds of Anderson River in 69° north latitude, on the Arctic coast at Fort Kenai, by Mr. Bischoff, and at Fort Simpson, Fort Rae, and Peel River. It has been found breeding at Calais by Mr. Boardman, and at Halifax by Mr. W. G. Winton. Eggs sent from Fort Yukon, near the mouth of the Porcupine River, by Mr. S. Jones, are of a rounded-oval shape, measuring 1.03 inches in length by .75 in breadth. In size, shape, ground-color, and color of their markings, they are hardly distinguishable from some eggs of Brewer’s Blackbird, though generally different. All I have seen from Fort Yukon have a ground-color of very light green, very thickly covered with blotches and finer dottings of a mixture of ferruginous and purplish-brown. In some the blotches are larger and fewer than in others, and in all these the purple shading predominates. One egg, more nearly spherical than the rest, measures .98 by .82. None have any waving lines, as in all other Blackbird’s eggs. Two from near Calais, Me., measure 1.02 by .75 of an inch, have a ground of light green, only sparingly blotched with shades of purplish-brown, varying from light to very dark hues, but with no traces of lines or marbling. According to Mr. Boardman, these birds are found during the summer months about Calais, but they are not common. Only a few remain of those that come in large flocks in the early spring. They pass along about the last of April, the greater proportions only tarrying a short time; but in the fall they stay from five to eight weeks. They nest in the same places with the Redwing Blackbirds, and their nests are very much alike. In early summer they have a very pretty note, which is never heard in the fall. Scolecophagus cyanocephalus, CAB. BREWER’S BLACKBIRD. _Psarocolius cyanocephalus_, WAGLER, Isis, 1829, 758. _Scolecophagus cyanocephalus_, CABANIS, Mus. Hein. 1851, 193.—BAIRD, Birds N. Am. 1858, 552.—CASS. P. A. N. S. 1866, 413.—HEERM. X, _S_, 53.—COOPER & SUCKLEY, 209.—COOPER, Orn. Cal. 1, 1870, 278. _Scolecophagus mexicanus_, SWAINSON, Anim. in Men. 2¼ cent. 1838, 302.—BON. Conspectus, 1850, 423.—NEWBERRY, Zoöl. Cal. and Or. Route; Rep. P. R. R. Surv. VI, IV, 1857, 86. _Quiscalus breweri_, AUD. Birds Am. VII, 1843, 345, pl. ccccxcii.