Bill, 1.10; tarsus, .75. Red of crown disappearing about on a line above the eye. Hab. Cape St. Lucas … var. lucasanus.
4. P. nuttalli. Anterior portion of back not banded with white; lores and nasal tufts white. Black stripes on side of the head very much broader than the white ones, and connected by a narrow strip with the black of the shoulders. Male with only the nape and occiput red. Hab. California (only).
b. One white stripe, only, on side of head, and this occupying whole auricular region. Tail-feathers narrowed at ends, the points of the middle ones much elongated. First quill longer than sixth. Bill very small, much shorter than head.
PHRENOPICUS, Bonap. Back and wings transversely banded with black and white, and sides spotted with black, as in Dyctiopicus.
5. P. borealis. Red of male restricted to a concealed narrow line on each side of the occiput, at the junction of the white and black. Maxillary black stripe very broad and conspicuous, running back to the series of black spots on sides of breast. Three outer
tail-feathers more or less white, with a few bars of black near their ends, principally on inner webs. Hab. South Atlantic States.
B. Body entirely continuous black; head all round immaculate white. First quill shorter than sixth.
XENOPICUS, Baird. Tail and primaries as in “A,” but much more lengthened. Bill as in Dryobates, but more slender.
6. P. albolarvatus. Red of male a narrow transverse occipital crescent, between the white and the black. Basal half, or more, of primaries variegated with white, this continuous nearly to the end of outer webs; inner webs of secondaries with large white spots toward their base. Hab. Sierra Nevada and Coast Ranges, Pacific Province, United States.
Subgenus DRYOBATES, Boie.