Genus XVII.--Coccothraustes, Briss. Grosbeak.

Birds of America

By John James Audubon, F. R. SS. L. & E.

VOLUME III.

GENUS XVII.--COCCOTHRAUSTES, Briss. GROSBEAK.

Bill of moderate length, extremely robust, almost as broad as the head, not compressed, conical, pointed; upper mandible rather broader than the lower, with the dorsal line slightly convex, the ridge indistinct, the nasal sinus extremely wide and short, the sides rounded, the edges simply arched and a little inflected, the notches almost obsolete, the tip a little deflected; lower mandible with the angle extremely short and wide, forming the fourth of a circle, the dorsal line straight, the sides at the base and in their whole length convex, the edges involute, the tip acute; nostrils basal, round. Plumage blended. Wings of moderate length, pointed, the outer three quills nearly equal, the second longest. Tail of moderate length, emarginate. Tarsus short, compressed, with seven scutella; toes moderate, hind toe stout, broad beneath; outer toe a little longer than the inner, and adherent at the base. Claws moderate, or rather stout, arched, compressed, acute. Upper mandible concave beneath, with three prominent lines.