Page [132]. After No. 337d. add 337e. Alaska Red-tail (B. b. alascensis). Resembling B. b. calurus "but smaller throughout, and, keeping in consideration the stage of plumage, dark areas blacker and more extended." ♂ W. 13.5; T. 7.67; ♀ W. 14.44; T. 8.69 (Grinnell).
Range—"Southeastern Alaska from Yakutat Bay to Admiralty Island and the Sitka Islands" (A. O. U.).
Page [138]. After No. 360b. add: 360c. Little Sparrow Hawk (F. S. paulus). Similar to No. 360 but smaller. ♂ W. 6.80; T. 4.12 ♀ W. 6.96; T. 4.00 (Howe).
Range—Southern half of Florida.
Page [140]. No. 379 proves to be separable into southern and northern races. The former retains the name Glaucidium gnoma gnoma, while the race of northern Mexico and Western United States, heretofore known by that name, becomes G. g. pinicola, the Rocky Mountain Pygmy Owl. (Nelson, Proc. Biol. Soc. Wash., XXIII, 1910, p. 103).
Page [142]. After No. 373h. add: 373i. Sahauro Screech Owl (O. a. gilmani). Nearest No. 373f but smaller and paler and with black markings more restricted (Swarth, Univ. Cal. Pub. Zool., VII, 1910, p. 1).
Range—"Lower Sonoran Life zone of southeastern California, Arizona, and probably New Mexico; and northwestern Mexico" (A. O. U.).
Page [143]. After No. 375f. add: 375g. Saint Michael Horned Owl (B. v. algistus). Similar to No. 375d. but larger; face less ochraceous, upper surface paler ochraceous. W. 14.60 (Oberholser).
Range—"Coast Region of northern Alaska from Bristol Bay and the Yukon northward" (A. O. U.).
Page [143]. After No. 275e. add: 375f. Labrador Horned Owl (B. v. heterocnemis). Similar to No. 375c. "but bill larger; posterior lower parts paler; feet lighter colored and less heavily spotted; upper parts with usually less ochraceous." (Oberholser).