580 



IT. S. r. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



Comparative measurements of species. 



CYANURUS CRIST ATUS, Swainson. 



Blue Jay. 



Coritis crhlatus, Linn. Syst. Nat. I, lOlli ed. 17.58, lOG ; 12th ed. 1766, 157.— Gmelin, Syst. Nat. I, 1788, 369.— 

 Wilson, Am. Orn. I, 1808, 2 ; pi. i. f. L— Bon. Obs. Wilson, 1824, No. 41.— Dodghtv, Cab. 

 N. H. II, 18.'?2, 62 ; pi. vi.— Add. Orn. Biog. II, 1834, 11 : V, 1839, 475 ; pi. 102. 



Garrulus crislatus, " Vieillot, En?yc]op. 890."— 1b. Oict. Xt, 477.— Bon. Syn. 1828, .58.— Sw. F. Bor. Am. II, 

 1831, 293.— Vieillot, Galerie, I, 1824, 160 ; pi. cii.— Aud. Birds Am. IV, 110 ; pi. 231. 



Pico crhlttla, Wagler, Syst. Av. 1627. Pica, No. 8. 



Cyamirus cristalus, Swainson, F. Bor. Am. II, 1831, App. 495. 



Cyanncorax cristatti3, Boh. List, 1838. 



Cyanoeilla cristala, Strickland, Ann. Mag. N. II. 1845, 261. — Cabanis, Mus. Hein. 1851,221. 



Cyanogarrulus cristahis, Bon. Consp. 1850, 376. 



Sp. Cii. — Crest about one-tbird longer than the bill. Tail iniicb graduated. General color above light purplish blue ; winga 

 and tail feathers ultramarine blue ; the secondaries and tertials, the greater wing coverts, and the exposed surface of tho tail, 

 sharply banded with black, and broadly tipped with while, except on tho central tail feathers. Beneath white ; tinged with 

 purplieh blue on the throat, and with bluish brown on the sides. A black crescent on tho fore part of tho breast, tho horns passing 

 forward and connecting with a half collar on the back of tho neck. A narrow frontal lino and loral region blank ; feathers on 

 the base of the bill, blue like the crown. Female rather duller in color and a liltio smaller. Length, 12.25; wing,5.65 ; tail, 

 5.75. 



Hub. — Eastern North America, west to tho Missouri. 



In addition to what lias been already stated, there is a narrow black line behind tlie eye 

 running into the cervical collar, which is overhung by the feathers of the crest ; the posterior 

 concealed ones of these also black. The amount of white on the tail decreases from the exterior. 



