CORVUS. 363 
ce. Tarsus not more than 2.10; wing averaging less than 11.10, the tail 
averaging less than 6.50. 
@, Plumage glossed with violet or purple above, lustreless black or 
very faintly glossed with purplish beneath. 
é. Larger and less glossy, the lower parts mostly dead black 
(sometimes with perceptible violet gloss), the upper parts 
glossed with dull violet (as in C. americanus); length about 
16.00-17.00, wing 10.10-11.50 (10.05), tail 5.90-7.00 (6.45), 
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 Barrp. Northwest Crow. 
é. 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 GuNDL. Cuban Fish Crow.! 
d*. Plumage glossed with violet-bluish, greenish blue, or steel-blue 
above, with greenish on lower parts. 
e'. 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 146% 1.06. Hab. Atlantic and 
Gulf coasts of United States, from Long Island to Louis- 
TaN ties eeceeasdersesenes 490. C. ossifragus Wits. Fish Crow. 
é. 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 9.20-9.80 
(9.32), tail 5.80-6.50 (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. Northern Mexico (Mazatlan to Tampico). 
C. mexicanus GMEL. Mexican Crow.” 
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 T—EmMM, Cuban Crow.3 
1 Corvus minutus GuNDL., Jour. Bost. Soe. vi. 1852, 315. 
2 Corvus mexicanus GMEL., S. N. i, 1788, 375. 
8 Corvus nasicus Temm., Pl. Col. ii. 1838, pl. 413. 
