BIRDS — CORVIDAE — CYANURUS, 



579 



List of specimens. 



Catel. No. 



8476 

 5899 

 2845 

 4937 

 4567 



Locality. 



San Francisco, Cal. 



Santa Clara, Cal 



Santa Barbara, Cal. 



San JoB^, Cal. 



San Diego, Cal 



When collected. 



Whence obtained. 



1855. 



B. D. Cutts... 



Dr. Cooper 



8. F. Baird. .. 

 A. J. Grayson. 

 Dr. Hammond . 



Collected by — 



J. J. Audubon 



CYANUEA, S^ainson. 



Ci/anurus, Swainson, F. Bor. Am. II, 1831, 495, Appendix. Type Corvus oristatus, Linn. 



CyanocUla, Cabahis, Mus. Hein. 1851. Not of Strickland, 1845. 

 Ch. — Head crested. Wings and tail blue, with transverse black bars ; head and back of the same color. Bill rather slender, 

 somewhat broader than high at the base ; culmen about equal to the head. Nostrils large, nearly circular, concealed by bristles. 

 Tail about as long as the wings, lengthened, graduated. Hind claw large, longer than its digit. 



The culmen is straight to near the tip, where it is gently decurved ; the gonys is convex at 

 the hase, then straight and ascending. The hill has a very slight notch at the tip. The 

 nostrils are large, nearly circular, or slightly elliptical. The commissure is straight at the 

 base, then bending down slightly near the tip. The legs present no special peculiarities. The 

 crest on the head consists of a number of elongated, narrow, lanceolate occipital feathers. 



The O. cristata differs from 0. stelleri, and still more from C. macrolophus, in having a shorter, 

 stouter, and more convex and curved bill ; the nasal bristly feathers with black shafts, and the 

 lateral branches ash color, instead of the whole being black. The tarsi are shorter, the colors 

 quite different. 



Synopsis of species. 



Common characters. — Wings and tail blue, conspicuously banded with black. Head with a 

 prominent crest. 



Bill short. Lateral tail feathers tipped with white. Under parts whitish ; breast with 

 a crescent of black connected with a half collar on the neck above G. cristata. 



Bill longer. Body blue. Head, neck, and upper part of back dull sooty black. 



Occipital crest rather short. Frontal feathers slightly glossed with dull blue. 

 No white about the eyes G.stdleri. 



Occipital crest very long. Frontal feathers conspicuously streaked with bluish 

 white. A white streak above the eye 0. macrohphu». 



