HABITS. This somewhat rare and very beautiful Warbler requires additional investigation into its habits before its history can be regarded as satisfactorily known. Save in reference to its wider distribution during its southern migrations, little more is known as to its habits than where Audubon left its history nearly thirty years since. The Smithsonian collection has specimens from Pennsylvania, Ohio, Wisconsin, Missouri, Illinois, and from Central America. Mr. Sclater has received specimens from Mexico, and from Ecuador in South America. Other writers mention having specimens from Guiana, Martinique, and Panama, and Dr. Bryant found it in the Bahamas. It is thus known to have a wide distribution from the Atlantic to the Mississippi River, as far to the north probably as Labrador. Its area of reproduction is not known with exactness, but the southern limit is supposed to be the high wooded districts of Pennsylvania, New York, and New England. A young bird was taken by Holböll, October 16, 1845, at Frederikshaab, Greenland. In 1837 an egg was sent me from Coventry, Vt., which purported to belong to this bird; and in the following summer its nest and eggs were procured in a wild, secluded part of Roxbury, Mass. In neither case was the identification entirely free from doubt. Dr. Bachman states that when a resident of Lansingburg, N. Y., in 1833, he saw a pair of these birds in the act of constructing their nest. Mr. Allen has no doubt that a few breed in the vicinity of Springfield, Mass., as he has obtained them as late as June 24. He found it most common in mixed or hard-wood forests. It arrives about the middle of May. Professor Verrill gives it as a summer resident of Western Maine, though rarely seen on account of its habit of keeping concealed among the dense foliage. Mr. Boardman gives the same account of its residence in summer in the neighborhood of Calais. Mr. Audubon did not regard this bird and his “Hemlock Warbler” as the same species, but gave distinct and different accounts of their habits. We have therefore to receive with caution these records of peculiarities. He found the Blackburnian Warbler breeding in Northeastern Maine, in New Brunswick, in the Magdaleine Islands, and in Labrador and Newfoundland. He states, correctly, that it has a very sweet song of five or six notes, much louder than seemed possible from the size of the bird. It pursues its insect prey among the branches of the fir-trees, moving along after the manner of the common Redstart. Mr. McCulloch, of Halifax, gave Mr. Audubon a nest of this bird with three eggs. The nest was formed externally of different textures, lined with fine delicate strips of bark and a thick bed of feathers and horse-hair. The eggs were small, conical, with a white ground spotted with light red at the larger end. The nest was in the small fork of a tree five feet from the ground, and near a brook.