Range.--Northern Lower California north to Marin County and Sacramento Valley, California; local.
=580a. Scott Sparrow= (_A. r. scottii_). Similar to No. 580, but above brighter reddish brown, the margins to the feathers grayer, the underparts much paler, the breast grayish, the throat and middle of the belly whitish.
Range.--Northwestern portion of Mexican plateau and adjacent portions of Arizona, New Mexico and western Texas (El Paso Co.) (Ridgw.)
=580b. Rook Sparrow= (_A. r. eremÅca_). L. 6. _Ads._ Crown reddish chestnut, back olive-brown margined with gray. Similar to No. 580a, but back of a different color from crown, the grayish margins wider.
Range.--Limestone Hill districts of middle Texas, from Kinney and Maverick counties on the Rio Grande, northeastward to Cook County and westward at least to Tom Green County; south in winter to Mexico. (Ridgw.)
=580c. Laguna Sparrow= (_A. r. sororia_). Similar to No. 580a, but bill somewhat stouter, reddish brown above averaging brighter and wider.
=540. Vesper Sparrow= (_PoÅcetes gramineus_). L. 6.1. Outer tail-feather mostly white; hind toe-nail not longer than toe; _lesser_ wing-coverts reddish brown. _Ads._ Above grayish brown streaked with black and chestnut; below whitish, breast and sides streaked with black and chestnut. _Notes._ Call, _chip_. Song, loud and musical _Look-look_, _see-see_, _me-me-me-me-me-me-sing_, followed by a confusion of notes.
Range.--Eastern North America; breeds from Virginia, Illinois and Missouri north to New Brunswick and Manitoba; winters from Virginia and southern Illinois to the Gulf of Mexico.
=540a. Western Vesper Sparrow= (_P. g. confinis_). Similar to No. 540, but paler, less black above; bill somewhat more slender.
Range.--Western United States from the Plains to the Sierra; breeds from Arizona and New Mexico north to the Saskatchewan and British Columbia; winters south into Mexico.
=540b. Oregon Vesper Sparrow= (_P. g. affinis_). Similar to No. 540a, but smaller, W. 3; bill still more slender; plumage browner, more buffy; browner even than No. 540, the underparts, including belly, suffused with buff.
Range.--Pacific coast; breeds in western Oregon (and north?); winters southwest of the Sierra to San Diego, California.