BIRDS — CORVIDAE — CYANURUS. 



579 



List of (tpccimens. 



C'Htal. No. 



I>x«lily. 



Whi'ii collectctl. 



■\Vlicnco olitaiint'd. 



8476 Siin Fnincisco, Oil R. P. C'litts... 



6899 Siinta Clara, CttI 1855 Dr. Cooper 



2845 Soiita Hurbara, Cal S. K. Biiird. .. 



4937 San Josd, Cal A. J. Grayson. 



4567 San Diego, Cul Dr. Hiunmond. 



CoUectoil by— 



.1. J. Auilulion 



CYANUIiA, Stt ainson. 



Ci/onurus, SwAiSBON, F. Bor. Am. 11, 1S31, 495, Appendix. Type Corviis cristalus, Linn. 



Cyanoeilla, Cabank, Mus. Hein. 1851- Not of Strickland, 1845. 

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

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

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



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

 the base, then straight and ascending. Tlie bill 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 C. cristata differs from C. 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 tippsd with white. Under parts whitish ; breast with 

 a crescent of black connected with a half collar on the neck above C. 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 C. stdleri. 



Occipital crest very long. Frontal feathers conspicuously streaked with bluish 

 white. A white streak above the eye O, macrolophus. 



