142 University of California Publications in Zoology (Vou. 30 Sitta canadensis Linnaeus. Red-breasted Nuthatch A red-breasted nuthatch heard calling in woods near Atlin on June 5 was the only one of the species noted during the nesting season. Next seen (a single bird) on Spruce Mountain, August 1. During the latter part of August the species was migrating through the woods near Atlin in fair abundance. Last seen by me on August 31, though it may be expected to occur in this region until a much later date. Penthestes atricapillus septentrionalis (Harris) Long-tailed Chickadee Presumably resident in the region throughout the year, though not abundant. Seen at Carcross during the last week of May, and about Atlin during the whole of my stay, usually in poplar woods. Six specimens were collected (August 16 to 28), all in fresh fall plumage (nos. 44954-44959). Penthestes gambeli abbreviatus Grinnell Short-tailed Mountain Chickadee A male bird (no. 44960) in breeding condition was shot in spruce woods near Atlin, June 12. Presumably the species nests in this gen- eral region, but it was not otherwise observed. This is the northern- most station at which it has been found, Grand Rapids, on the Stikine River, 160 miles to the southward, being the nearest point of record (Swarth, 1922, p. 297). Penthestes hudsonicus columbianus (Rhoads). Columbian Chickadee A fairly common species in the Atlin region, more so than the long- tailed chickadee. Showed decided preference for spruce woods. Twenty-three specimens were collected (nos. 44961-44983), comprising six breeding adults, six juvenals, and three adults and eight immatures in fresh fall plumage. The subspecies colwmbianus, described by Rhoads (1893, p. 23), was included in the 1895 edition of the A. O. U. Check-list, but it was eliminated later (A. O. U. Committee, 1908, p. 355) for reasons that are not known to me. The series of birds above listed, together with others from more southern points in British Columbia (see Swarth,