Range.—East central Florida.
Page [245]. After No. 735b add: 735c. Yukon Chickadee (P. a. turneri). "Similar to P. a. septentrionalis but slightly smaller, coloration grayer above and more extensively or purely white beneath, and white edgings of greater wing-coverts, secondaries, and outermost rectrices broader, more purely white" (Ridgway).
Range.—Alaska, north and west of Cook Inlet.
Page [248]. After No. 622c add the northeastern form of the Loggerhead Shrike, which is intermediate between L. l. ludovicianus and L. l. excubitorides and has been separated as 622e. Migrant Shrike (L. l. migrans). Similar to L. l. ludovicianus but bill smaller and colors averaging paler. Not so pale as, and lacking the whitish upper tail-coverts of L. l. excubitorides.
Range.—"Eastern North America. Breeds chiefly in Transition and Upper Austral Zones from northern Minnesota, Wisconsin, Michigan, southern Ontario, southern Quebec, Maine, and New Brunswick, south to eastern Kansas, southern Illinois, Kentucky, western North Carolina and interior of Virginia (locally in the east); winters from Middle States and southern New England to Texas, Louisiana, and Mississippi" (A. O. U.).
The Range of the Loggerhead Shrike (No. 622) is therefore restricted to the South Atlantic and Gulf States from southern North Carolina south through Florida and west to Louisiana.
Page [250]. After No. 612 add: 612a. Lesser Cliff Swallow (P. l. tachina). Similar to P. l. lunifrons but decidedly smaller, the forehead ochraceous instead of cream color. W. 4.08; T. 1.77 (Oberholser).
Range.—"Texas and Mexico. Breeds in western Texas, the Rio Grande Valley, and through eastern Mexico to Vera Cruz" (A. O. U.).
Page [250]. No. 612.2. Petrochelidon melanogastra, becomes No. 612b, Petrochelidon lunifrons melanogastra.
Page [250]. After No. 611.1 (which is now believed to be of only occasional occurrence in southern Florida) add: 611.2. Gray-breasted Martin (Progne chalybea). Male much like the female of P. subis but brighter, more uniformly steel-blue above. Female like female of P. subis but brighter, more uniformly gray, the belly whiter, without black shaft streaks; the nape without sign of a collar in either sex. W. 5.2.