CORVUS. 3G1 



locality). £<jgs 2-7, palo bluish green, pale olive, or olive, spotted or dashed (or 

 both) with olive- brown (sometiiues nearly uniform olive, from density of 

 markings). 



a'. Feathers of throat lanceolate, distinct from one another. {Ravens.) (Nest usually 

 among rocks.) 

 b'. Feathers of nock dull gray at base ; nasal tufts covering not more than 

 basal half of upper mandible; exposed culmen 2.40, or more, wing more 

 than 15.00. 

 c'. Third quill equal to or longer than fifth. 



(/'. Bill relatively shorter and higher, lanceolate feathers of throat 



less developed, more purplish in color, and plumage usually 



less lustrous; wing 16.75-18.00 (17.25), tail 9.40-10.00 (9.60), 



exposed culmen 2.65-3.00 (2.81), depth of bill through nostril 



1.05-1.12 (1.08), tarsus 2.78-2.95 (2.8G). Hab. Europe and parts 



of Asia. C. corax Lisx. Raven.' 



(P. Bill relatively longer and shallower, lanceolate feathers of throat 



larger, more violet or bluish, and plumage usually more 



lustrous. 



e'. With smaller or slenderer bill, the tarsus more slender, with 



less of upper portion concealed by feathering of lower 



part of thighs; length about 21.50-26.00, wing 15.10-18.00 



(16.87), tail 9.00-11.00 (9.86), exposed culmen 2.40-3.05 



(2.80), depth of bill through nostril .82-1.05 (.94), tarsus 



2.60-3.00(2.78). ^^r^/s 1.95 X 1.29. ZTai. Western United 



States, and south to Guatemala. 



486. C. corax sinuatus (Wagl.). Mexican Raven, 

 e'. With larger or stouter bill, tarsus shorter and stouter, with 

 more of upper portion concealed by feathering of lower 

 part of thighs; length about 22.00-26.50, wing 16.50-18.00 

 (16.99), tail 9.20-10.50 (9.86), exposed culmen 2.65-3.45 

 (3.03), depth of bill at nostrils .95-1.12 (1.04), tarsus 2.50- 

 2.80 (2.65). Eggs 1.95 X 1.36. Hab. Northern North 

 America, from Greenland to Alaska, south to British Co- 

 lumbia, northern Michigan, Canada, New Brunswick, etc' 

 486a. C. corax principalis Kidgw. Northern Raven.' 

 c*. Third quill decidedly shorter than fifth. 



Otherwise like C corax principalis, but still larger ; wing 16.75- 

 18.10 (17.44), tail 10.00-10.85 (10.49), exposed culmen 3.00-3.40 



« CorcH. corax LlNN., S. N. ed. 10, i. 1T58, 105. 



' From lack of specimens, I am anabic to determine which form Ravens from the eastern United States 

 belong to. 



' New subspecies, fnr which there is nnfortunatoly no older nnmo available. Corriit carnlvonta Bartr. and C. 

 fiijii6n'» AOASS. are purely nomina niirfa ; C. cornx v!kt. Ililornlis Holb. (1S4.'?) is preoccupied (C ^V/ora/MBiiKiiM, 

 1831) ; while C. coci/crut Cabot, quoted by Coirs and others a^ a synonymo of C. corax, is in reality Ptilorhinut 

 mexicanxu Rl'pp,, and is described from Yucatan. 



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