HABITS. Two specimens of this Warbler, obtained near Henderson, Ky., May, 1811, by Mr. Audubon, are all its claim to be recognized as a good species. None have since been seen. These birds are described as having been busily engaged in collecting insects among the branches of a dogwood tree. Their motions were like those of other Warblers. This is all we as yet know as to the history of this species, and its claims to be regarded as a good and distinct species are involved in doubt. GENUS DENDROICA, GRAY. _Sylvicola_, GRAY, Genera Birds, 2d ed. 1841, 32. (Not of Humphreys nor Swainson.) _Dendroica_, GRAY, Genera Birds, Appendix, 1842, 8. _Rhimamphus_, HARTLAUB, Rev. Zool. 1845, 342. (Not of Rafinesque, Am. Monthly Mag. 1818, and Jour. de Phys. 1819.) [Line drawing: _Dendroica coronata._ 38714] GEN. CHAR. Bill conical, attenuated, depressed at the base, where it is, however, scarcely broader than high, compressed from the middle. Culmen straight for the basal half, then rather rapidly curving, the lower edge of upper mandible also concave. Gonys slightly convex and ascending. A distinct notch near the end of the bill. Bristles, though short, generally quite distinct at the base of the bill. Tarsi long; decidedly longer than middle toe, which is longer than the hinder one; the claws rather small and much curved; the hind claw nearly as long as its digit. The wings long and pointed; the second quill usually a very little longer than the first. The tail slightly rounded and emarginate. _Colors._ Tail always with a white or yellow spot; its ground-color never clear olive-green. In _D. æstiva_ edged internally with yellow. Eggs usually with a white or a bluish-white ground, marked with purplish-brown and obscure lilac; in some, mingled with varying shades of sienna-brown. Nest, so far as known, in bushes and trees, except _D. palmarum_, which is on the ground. [Illustration: _Dendroica auduboni._] The genus _Dendroica_ is one of the most extensive as to species of any in North America, and scarcely admits of any subdivision. There is a little variation in the bill, wings, etc., the chief peculiarities being in _D. castanea_ and _pennsylvanica_, in which the bill is broader, and more depressed, with longer bristles; in _D. striata_, where the bill is narrow with scarcely any bristles; and in _D. palmarum_ and _kirtlandi_, where the wings are very short, scarcely longer than the tail. _D. palmarum_ has the tarsus unusually long. The colors in all are strongly marked, and the species are among the most beautiful of all belonging to our fauna, and are the most conspicuous for their numbers and in their migrations.