CORVUS. 363 



c*. Tarsus less than 2.10 ; wing averaging less than 11.00, the tail aver- 

 aging less than 7.00. 

 d l . Plumage glossed with violet or purple above, lustreless black or 

 very faintly glossed with purplish beneath. 

 e 1 . Larger and less glossy, the lower parts dull dead black (some- 

 times with barely perceptible violet gloss), the upper parts 

 glossed with dull violet (as in G. amerieanus) ; length about 

 16.00-17.00, wing 10.10-11.10 (10.72), tail 6.00-6.90 (6.43), 

 exposed culmen 1.60-1.90 (1.75), depth of bill at base 

 .65-.72 (.70), tarsus 1.80-2.05 (1.93). Eggs 1.56 X 1-08. 

 Hab. Northwest coast, from Washington Territory (and 

 Oregon ?) to Kadiak, Alaska. 



489. C. caurinus Baird. Northwest Crow. 



e*. Smaller and more glossy, the lower parts glossy black, with 



slight (?) purple reflections, the upper parts more distinctly 



glossed with purple ; length about 15.00, wing 10.35, tail 



6.00, " bill" 1.80, tarsus 2.00. Hab. Cuba. 



C. minutus Gttndl. Cuban Fish Crow. 1 

 d 2 . Plumage glossed with violet-bluish, greenish blue, or steel-blue 

 above, with greenish on lower parts. 

 e 1 . Larger and less glossy, the upper parts glossed with violet- 

 bluish, changing to a more greenish blue tint on head, 

 neck, and lower parts; length about 15.00-17.50, wing 

 10.20-11.40 (10.88), tail 6.00-7.00 (6.37), exposed culmen 

 1.60-1.80 (1.71), depth of bill at base .58-.65 (.61), tarsus 

 1.70-2.00 (1.87). Eggs 1.47 X 1-04. Hab. Atlantic and 

 Gulf coasts of United States, from Long Island to Louis- 

 iana 490. C. ossifragus Wils. Fish Crow. 



e\ Smaller and much more glossy, the upper parts soft steel-blue, 

 changing to violet on crown, the lower parts rich soft 

 greenish blue; length about 12.00-14.50, wing 9.20-9.60 

 (9.32), tail 5.80-6.40 (6.11), exposed culmen 1.50-1.65 

 (1.55), depth of bill at base .50-.58 (.54), tarsus 1.50-1.70 

 (1.62). Hab. "Western Mexico (vicinity of Mazatlan). 



C. mexicanus Gmel. Mexican Crow. 1 



b*. Nostrils scarcely concealed by the short, imperfectly developed nasal tufts; 

 corners of mouth naked. 

 Entirely violaceous-black, the feathers everywhere smoky gray be- 

 neath surface ; wing 11.00, tail 7.75, culmen (to base) 2.45, depth of 

 bill at base .80. Hab. Cuba. 



C. nasicus Tbmm. Cuban Crow. 3 



1 Corvua minutus CrUNDL., Jour. Bost. Soe. vi. 1852, 315. 



2 Corvua mexieanua Gmel., S. N. i. 1788, 375. 



3 Corvua naaicus Temm., PI. Col. ii. 1838, pi. 413. 



