The arrangement in the preceding diagnosis is perhaps not perfectly natural, although sufficiently so for our present purpose. Thus, Hylotomus, in having the lateral ridge extending to the end of the bill, is like Picus, but the nostrils are broader, more open, and not acute anteriorly. The tail-feathers of Sphyropicus differ greatly from those of the others in being abruptly acuminate, the points elongated, narrow, and nearly linear, instead of being gently cuneate at the ends. Campephilus and Hylotomus belong to Sundevall’s Angusticolles, with their long slender neck, and elongated occipital crest (Dryocopinæ, Cab.); the other genera to Securirostres, with shorter, thicker neck, and no crest (Dendrocopinæ, Cab.). But no two genera in the subfamily are more distinct than Campephilus and Hylotomus.
Genus CAMPEPHILUS, Gray.
Campephilus, Gray, List of Genera? 1840. (Type, C. principalis.)
Megapicus, Malherbe, Mém. Ac. de Metz, 1849, 317.
Gen. Char. Bill considerably longer than the head, much depressed, or broader than high at the base, becoming somewhat compressed near the middle and gradually bevelled off at the tip. Culmen very slightly curved, gonys as concave, the curve scarcely appreciable; commissure straight. Culmen with a parallel ridge on each side, starting a little above the centre of the basal outline of the bill, the ridge projecting outwards and downwards, and a slight concavity between it and the acute ridge of the culmen. Gonys considerably more than half the commissure. Nostrils oval below the lateral ridge near the base of the bill; concealed by the bristly feathers directed forward. Similar feathers are seen at the sides of the lower jaw and on the chin.
Campephilus principalis.
3869 ♂
Feet large; outer hind toe much longest; claw of inner fore toe reaching to middle of outer fore claw; inner hind toe scarcely more than half the outer one; its claw reaching as far as the base of the inner anterior claw, considerably more than half the outer anterior toe. Tarsus rather shorter than the inner fore toe. Tail long, cuneate; shafts of the four middle feathers abruptly much larger than the others, and with a deep groove running continuously along their under surface; webs of the two middle feathers deflected, almost against each other, so that the feathers appear narrower at the base than terminally. Wings long and pointed, the third, fourth, and fifth quills longest; sixth secondary longest, leaving six “tertials,” instead of three or four as usual; primaries long, attenuated. Color continuous black, relieved by white patches. Head with a pointed occipital crest.
This genus embraces the largest known kind of Woodpecker, and is confined to America. Of the two species usually assigned to it, only one occurs within the limits of the United States, C. imperialis, given by Audubon, and by subsequent authors on his credit, really belonging to Southern Mexico and Central America. The diagnoses of the species are as follows:—
Common Characters. Bill ivory-white. Body entirely glossy blue-black. A scapular stripe, secondaries, ends of inner primaries, and under wing-coverts, white. Crest scarlet in the male, black in the female.