256 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



hh. Sides of head and nasal plumes not black, nor conspicuously (if 

 any) different from color of crown or throat. 



Aphelocoma (\). 323) 



gg. Conspicuously crested (crest pointed) Cyanocitta (p. 345) 



ff. Plumage without any blue (mostly grayish or brownish); longest 

 primaries exceeding secondaries by more than length of commissure. 



Perisoreus (p. 364) 



Genus CORVUS Linnaeus. 



Corvvs LiNN^us, Syst. Nat., ed. 10, i, 1758, 105. (Type, Ijy elimination, C. corax 



Linnseus. ) 

 Lycus (not of Fabricius, 1787) Boie, Isis, 1822, 55. (Type, Corvus monedula 



Linnpeus. ) 

 Monedula (not of Linnaeus, 1762, nor Coquebert, 1798) Brehm, Isis, 1828, 1273. 



(Type, Corvvs monedula Linngeus. ) 

 Corone Kaup, Naturl. Syst., 1829, 99. (Type, Corvus corone Linmeus. ) 

 Coloeus Kaup, Naturl. Syst., 1829, 114 (Type, Corvus monedula Linnaeus.) 

 Coloeus Sharpe, Cat. Birds Brit. Mus., iii, 1877, 25. 

 (?) Gazzola Bonaparte, Consp. Av., i, 1850, 75; Compt. Rend., xxxvii, 1854, 828. 



( Type, G. typica Bonaparte. «) 

 Ainbh/corax Bonaparte, Compt. Rend., xxxvii, 1853, 829. (Type, Corvus violaceus 



Bonaparte.) 

 Pterocorax Kaup, Journ. fiir Orn., ii, no. 12, Suppl. Nov., 1854, p. Iv. (Type, 



Corvus scapulatus Daudin. ) 

 Cora.T Kaup, Journ. fiir Orn., ii, no. 12, Suppl. Nov., 1854, p. Iv. (Type, Corrus 



corax Linnaeus?) 

 Anomalocorax Fitzinger, Sitz. Ak. Wien, xliv, Abth. 1, 1863, 209. (Type, Corvus 



splendens Vieillot. ) 

 Trypanocorax Sundevall, Meth. Av. Tent., 1872, 43 (ex Bonaparte, Ann. Sci. 



Nat., i, 1854, 133=nomen nudum). (Type, Corvus frugilegus hinnseus.) 

 (?) Heferocorax Sharpe, Cat. Birds Brit. Mus., iii, 1877, 11. (Type, Corvus capensis 



Lichtenstein.«) 

 (?) Rhinocorax Sharpe, Cat. Birds Brit. Mus., iii, 1877, 45. (Type, Corvus affinis 



Riippell.«) 

 Microcorax Sharpe, Cat. Birds Brit. Mus., iii, 1877, 48. (Type, Corvus jama icensis 



Gmelin. ) 

 (?) Macrocorax Sharpe, Cat. Birds Brit. Mus., iii, 1877, 51. (Type, Corvus fuscica- 



pillus Gray.«) 



Large Corvina?, with the wing more (usually much more) than 2'SO 

 mm. long; nasal plumes covering at least the basal third of the 

 maxilla; wings long and pointed, reaching nearly or quite to tip of 

 tail, the eighth or seventh primary longest, the four outermost with 

 inner web sinuated; tail rounded or slightly graduated. 



Coloration (of American species). — Entirely dark colored, without 

 anj^ white except, sometimes, on concealed basal portion of feathers of 

 the neck, etc. ; all the species except one {C. jamaice7isis) uniform black, 

 more or less gloss}', or gloss}' steel-blue and violet {C. mexicanus). 



Nidification. — Nest of twigs, strips of bark, etc., lined with finer 

 materials, open above, placed in trees (more rarely on clifi's or build- 



«The type species of these supposed genera I have not been able to examine, 



