HAB. Coasts of Oregon and Washington Territories, south to San Francisco, California. Melting eastward and south into _megalonyx_. West Humboldt Mountains and Northern Sierra Nevada. [Line drawing: 2867] Comparing this race with _arcticus_, we do not find much difference in the white of the scapular region, except that the white marks here, as elsewhere on the wing, are rounded, the extreme end of the outer web of the feather being black instead of running out acutely white to the very tip of the outer webs of the feathers. This gives rather less extension to the white. In fact, most of the white marks are edged externally with black, converting them into spots. There is no white whatever at the exposed base of the outer web of the second to fifth primaries, and there is only a trace of white near the end, instead of having a conspicuous white edging from base to near the tip. The outer web of the outer tail-feather, instead of being entirely white for the exposed portion, is only very slightly edged with white; usually entirely black. The white at the end of the feathers is much more restricted, and extends only over the three outer feathers; usually not reaching to the shaft. The relations to var. _megalonyx_ have been given under the latter head. HABITS. The Oregon Ground Robin, so far as known, has a restricted residence, the western portion of Oregon and Washington Territory during the summer, and in the more northern portions of California. Its occurrence in the latter State seems to have escaped the notice of Dr. Cooper, though he gives it conjecturally, having seen birds which he supposed to be of this species in the higher Sierra Nevada. In its habits and notes Dr. Cooper could observe no difference between this species and _P. megalonyx_, both having the complaining _mew_, from which they have obtained the name of Catbird on that coast. Mr. J. K. Lord found a nest containing six eggs, which he supposed to belong to a bird of this species, at Fort Colville. It was built on the top of a stump, round which young shoots had grown like a fringe, completely hiding it from the sharpest eye. Mr. Hepburn met with it at Victoria. Dr. Cooper, in his Report on the Birds of Washington Territory, states that the song of this species in spring, as it sits on a low bush enjoying the sunshine, is like the final trill of the Redwing, or the lisping faint notes of the Cowbird. It is a constant resident of the Territory, but only frequents the edge of the coast in winter. He also mentions finding it about thirty miles south of San Francisco in autumn. Dr. Suckley met with it west of the Cascade Mountains.