†=Otocoris alpestris aphrasta= Oberholser, Proc. U. S. Nat. Mus., XXIV, June 9, 1902, pp. 806, 860 (Casas Grandes, Chihuahua, Mexico). Revived as a subspecies. (_Cf._ Oberholser, Bird-Lore, XX, No. 5, Oct. 1, 1918, pp. 346-347.) Range: central northern Mexico, north to southeastern Arizona and southwestern New Mexico.
†=Otocoris alpestris enthymia= Oberholser, Proc. U. S. Nat. Mus., XXIV, June 9, 1902, pp. 807, 817 (St. Louis, Saskatchewan, Canada). Revived as a subspecies. (_Cf._ Oberholser, Bird-Lore, XX, No. 5, Oct. 1, 1918, pp. 345-346.) Range: Great Plains region from northwestern Texas to Saskatchewan.
†=Aphelocoma californica oöcleptica= Swarth. New subspecies. Swarth, Univ. Calif. Publ. Zool., XVII, No. 13, Feb. 23, 1918, p. 413 (Nicasio, Calif.). Range: coast region of northern California.
†=Sieberocitta= Coues, Key to North Amer. Birds, 5th ed., I, 1903, pp. 497, 499 (type, _Cyanocitta ultramarina_ var. _arizonæ_ Ridgway). Recognized as a subgenus. (_Cf._ Swarth, Univ. Calif. Pub. Zool., XVII, No. 13, Feb. 23, 1918, pp. 406-407.) Includes the following North American forms:
=Aphelocoma sieberi arizonæ= (Ridgway). =Aphelocoma sieberi couchii= (Baird).
†=Corvus corax europhilus= Oberholser. New subspecies. Oberholser, Ohio Journ. Sci., XVIII, No. 6, April, 1918 (published, May 6, 1918), p. 215 (Ardell, Alabama). Range: eastern United States and southeastern Canada.
†=Agelaius phœniceus arctolegus= Oberholser, ‘The Auk,’ XXIV, No. 3, July, 1907, p. 332 (Fort Simpson, Mackenzie, Canada). Reinstated as a subspecies. (_Cf._ Oberholser, ‘The Auk,’ XXXV, No. 1, Jan., 1918, p. 64.) Range: middle Canada and central northern United States, wintering in the southeastern United States.
†=Icterus icterus= (Linnæus). _Oriolus icterus_ Linnæus, Syst. Nat., ed. 12, I, 1766, p. 161 (warmer parts of America). Recorded from a specimen taken at Santa Barbara, Calif. (_Cf._ Bowles, ‘The Auk,’ XXVIII, No. 3, July, 1911, pp. 368-369.)
=Quiscalus quiscula quiscula= (Linnæus) becomes =Quiscalus quiscula versicolor= Vieillot (_Quiscalus versicolor_ Vieillot, Nouv. Dict. d’Hist. Nat., XXVIII, 1819, p. 488, North America), because _Quiscalus quiscula quiscula_ is applicable only to _Quiscalus quiscula aglæus_ Baird. (_Cf._ Wayne, ‘The Auk,’ XXXV, No. 4, Oct., 1918, p. 440.)