Primary quills, shining black; secondaries and tertiaries, white at their bases, and brownish black at their ends; greater coverts narrowly tipped with brownish white; lesser coverts whitish on both margins, especially at their bases, terminated with brownish. Rump with the plumage white at the base. Bill, yellow, (in skin,) feet, yellow. Adult, as described by authors cited above. Large frontal space, commencing at the base of bill, white, which is also the colour of the greater wing coverts, the abdomen, and the tail. All other parts of the plumage blackish brown; bill, cere, legs and feet, yellow. Hab. Russian possessions in Asia and America. Spec. in Mus. Acad. Philada. Obs. The largest of all known Eagles, and nearly related to _H. Washingtonii_ (Aud.). It differs from the latter, as described by Audubon, in being larger generally, but has the wing shorter and the tail wedge shaped, and containing fourteen feathers. We suppose _H. Washingtonii_ to be the young of a closely allied species, and that both are strictly congeneric with _H. leucocephalus_, _H. albicilla_, _H. vocifer_, and others known as Fishing Eagles. [Illustration: Plate 7 The Ground Wren Chamaea fasciata (_Gambel_)] CHAMÆA FASCIATA.—(Gambel.) The Ground Wren. PLATE VII.—Adult Male. This little bird was discovered in California, by William Gambel, M. D., an enthusiastic and highly talented young naturalist, who, during an overland journey across the North American Continent, made many discoveries, and added much valuable information to several departments of Natural History, and we regret to say, whose recent death, during a second expedition of the same character, occurring, as it did, so early, and thus terminating so prematurely a life of such promise, is to be deplored as a loss to science and to his country. Dr. Gambel’s account of this bird in the Proceedings of the Academy of Natural Sciences of Philadelphia, II. p. 265, and in the Journal of the same society, quarto, I. p. 34, which is the first and, as yet, the most satisfactory, is as follows: “For several months before discovering the bird, I was attracted in the fields of dead mustard stalks, the weedy margins of streams, low thickets and bushy places, by a continued loud, crepitant, grating scold, which I took for that of a species of Wren, but at last found it to proceed from this Wren-tit, if it may be so called. It was difficult to be seen, and kept in such places as I have described, close to the ground; eluding pursuit by diving into the thickest bunches of weeds and tall grass, or tangled bushes, and uttering its grating Wren-like notes whenever approached. But if quietly, watched, it may be seen, when searching for insects, mounting the twigs and dried stalks of grass sideways, jerking its long tail, and holding it erect like a Wren, which, with its short wings in such a position, it much resembles.