Dr. Woodhouse mentions finding this species in abundance in New Mexico and Texas, associated with Nuthatches and Titmice. Dr. Cooper found it abundant in Washington Territory, particularly in the winter, and ascertained positively that they breed there, by seeing them feeding their young near Puget Sound, in the month of August. According to Mr. Ridgway it is much less numerous in the Great Basin than the _R. calendula_. The food of this lively and attractive little bird during the summer months is almost exclusively the smaller winged insects, which it industriously pursues amid the highest tree-tops of the forest. At other seasons its habits are more those of the titmice, necessity leading it to ransack the crevices of the bark on the trunks and larger limbs of the forest-trees. It is an expert fly-catcher, taking insects readily upon the wing. But little is known with certainty regarding its breeding-habits, and its nest and eggs have not yet been described. The presumption, however, is that it builds a pensile nest, not unlike the European congener, and lays small eggs finely sprinkled with buff-colored dots on a white ground, and in size nearly corresponding with those of our common Humming-Bird. We must infer that it raises two broods in a season, from the fact that it spends so long a period, from April to October, in its summer abode, and still more because while Mr. Nuttall found them feeding their full-fledged young in May, on the Columbia, Dr. Cooper, in the same locality, and Mr. Audubon, in Labrador, observed them doing the same thing in the month of August. According to the observations of Mr. J. K. Lord, this species is very common on Vancouver’s Island and along the entire boundary line separating Washington Territory from British Columbia, where he met with them at an altitude of six thousand feet. He states that they build a pensile nest suspended from the extreme end of a pine branch, and that they lay from five to seven eggs. These he does not describe. Most writers speak of this Kinglet as having no song, its only note being a single chirp. But in this they are certainly greatly in error. Without having so loud or so powerful a note as the Ruby-crown (_R. calendula_), for its song will admit of no comparison with the wonderful vocal powers of that species, it yet has a quite distinctive and prolonged succession of pleasing notes, which I have heard it pour forth in the midst of the most inclement weather in February almost uninterruptedly, and for quite an interval. Bischoff obtained a large number of this species at Kodiak, and also at Sitka, where it seemed to replace the Ruby-crown. Regulus cuvieri, AUD. CUVIER’S KINGLET. _Regulus cuvieri_, AUD. Orn. Biog. I, 1832, 288, pl. lv, etc.—BAIRD, Birds N. Am. 1859, 228; Rev. Am. Birds, 66.