CORVUS. 363 



c". Tarsus not more tluin 2.10; wing averaging less than 11.10, the tail 

 averaging less than 6.50. 

 (T. Plumage glossed with violet or purple above, lustreless black or 

 very faintly glossed with purplish beneath, 

 e'. Larger and less glos.sy, the lower parts mostly dead black 

 (sometimes with perceptible violet gloss), the upper parts 

 glossed with dull violet (as in C. americivuts) ; 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, Ahiska. 



489. C. caurinus Baird. Northwest Crow. 



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



sliilht (?) 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 GtrsDL. Cuban Fish Crow.' 

 (P. 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 1.46 X 106. 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 ujipei- 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 (0.11), exposed culmen 1.50-1.65 

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

 (1.62). Hab. Xorthern Mexico (Mazatlan to Tampico). 



C. mexicanus Omkl. Mexican Crow.' 

 !>'. 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 Temm. Cuban Crow.' 



> Corviu minulut Grvni.., ,Tour. Bost. Soc. vi. 1S52, 315. 

 ' Cnrriu mexicanut Gmel., S. N. i. 1788, 375. 

 • Corruj naticut Temm., PI. Col. ii. 1833, pi. 413. 



