The characters of this race, as given in the diagnosis, appear to be really constant; and there is not a specimen in the series of those from the west which may not readily be referred to one or the other. The gray adult _maccalli_ differs from that of _asio_ in the much finer mottling of the general plumage; the medial black stripes of the feathers above being more sharply defined, and more distinct from the transverse zigzags. Below, the transverse dark bars are much finer, and nearer together. The face, neck, and jugulum more finely and uniformly barred. The white scapular spots have not the black border seen in _asio_. The size is smaller. The young of _maccalli_ differs from that of _asio_ in much finer bars above, the dusky rather prevailing; below, also, the bars are finer and nearer together. It is not necessary to compare this bird with any other than the _S. asio_, since it is not at all related to _choliba_, or any other southern species. _Scops maccalli_ is entirely distinct from the _S. trichopsis_, Wagler, notwithstanding the statement in the Ibis, for April, 1872 (p. 6), that “the name” is “really synonymous with _S. trichopsis_ of Wagler, the bird being quite distinct from _S. asio_, as has been pointed out elsewhere.” (P. Z. S. 1868, p. 57.) Scops asio, var. kennicotti, ELLIOT. KENNICOTT’S OWL. _Scops kennicotti_, ELLIOT, Pr. Ac. Nat. Sc. Phil. 1867, p. 69; Illust. Am. Birds, pl. xi.—BAIRD, Trans. Chicago Acad. Sc. I, II, 311, pl. xxvii, 1869.—DALL & BANNISTER, Tr. Chic. Ac. I, 1869, 273.—GRAY, Hand List, I, 47, 1869.—ELLIOT, Illust. Birds Am. I, XXVII.—FINSCH, Abh. Nat. III, 28.—_Scops asio_, var. _kennicotti_, (RIDGWAY) COUES, Key, 1872, 203. _? Scops asio_, COOP. & SUCK. P. R. R. Rept. XII, II, 155, 1860 (all citations from northwest coast).