529b. WILLOW GOLDFINCH. _Astragalinus tristis salicamans._ Range.--Pacific coast from Washington to Lower California. Similar to the eastern Goldfinch but back said to be slightly greenish yellow. 530. ARKANSAS GOLDFINCH. _Astragalinus psaltria psaltria._ Range.--United States, west of the Plains and from Oregon to Mexico. This species has greenish upper parts and yellow below; the crown, wings and tail are black, the bases of the lateral tail feathers and primaries being whitish. They are common in portions of their range, nesting in similar locations to those chosen by the common Goldfinch and laying from three to five eggs which are similar but slightly smaller. Size .60 × .45. Data.--Riverside, California, May 20, 1891. 5 eggs. Nest made of fine grasses lined with cotton; 5 feet from the ground in a small tree. 530a. GREEN-BACKED GOLDFINCH. _Astragalinus hesperophilus._ Range.--Mexico north to the Lower Rio Grande in southern Texas. A similar bird to the last but with the entire upper parts and cheeks, black. The habits, nests and eggs are identical with those of the Arkansas Goldfinch. 531. LAWRENCE'S GOLDFINCH. _Astragalinus lawrencei._ Range.--Pacific coast of California, wintering along the Mexican border. This grayish colored Goldfinch has a black face and yellow breast, rump, wing coverts and edges of the primaries. They are quite common in their restricted range, nesting either in upright crotches or in the forks of horizontal limbs. The four or five eggs which they lay are pure white; size .60 × .45. Data.--Santa Monica Canyon, Cal., April 26, 1903. Nest in a cypress tree 12 feet up; composed of grasses, feathers, etc. Collector, W. Lee Chambers. 532. BLACK-HEADED GOLDFINCH. _Spinus notatus._ Range.--Mountainous regions of Central America and southern Mexico; accidental in the United States. [Illustration 333: 529a--529b--530.] [Illustration: Bluish white.] [Illustration: right hand margin.] Page 332 533. PINE SISKIN. _Spinus pinus._ Range.--Breeds from northern United States northward, in the Alleghanies and in the Rockies south to New Mexico. Winters throughout the United States. Siskins are of the size of the Goldfinch (5 inches long), and their calls, songs and habits are similar to those of this bird. Their plumage is grayish brown, streaked with dusky and the bases of the wings and tail feathers are yellow. Like the Crossbills, they frequently feed along our northern borders, but very sporadically. Their nests are built on horizontal branches of pines or cedars at any elevation from the ground, being made of grasses and rootlets lined with hair or pine needles, and of rather frail and flat construction. Their eggs are laid during May or June and are greenish white, specked with reddish brown; size .68 × .48. Data.--Hamilton Inlet, Labrador, June 17, 1898. Nest on branch of a spruce, 10 feet from the ground; made of grass, lined with moss and feathers. Collector, L. Dicks.