BIRDS OF NORTH AND MIDDLE AMERICA. 323 



C[olumba] gymnophthalma Sclater and Salvin, Proc. Zool. Soc. Lond., 1868, 



143 (color of bill). 

 [Columba] gymnophthalma Sclater and Salvin, Nom. Av. Neotr., 1873, 132. — 



Sharps, Hand-list, i, 1899, 69. — Forbes and Robinson, Bull. Llverp. Mua., 



ii, 1900, 132. 

 Columba gymnopthalma Robinson, Flying Trip to Tropics, 1895, 164 (Curagao). 

 Picazurus gymnophthalvius Des Murs, in Chenu's Enc. d'Hist. Nat., Ois., vi, 



1654(?), 39. 

 [Crossophthalmus] gymnophthalmos BoNAFARtE, Consp. Av., ii, 1857, 55. — Reich- 



ENBACH, Tauben, i, 1862, 66; u, 1862, 172, pi. 2, fig. 23. 

 Crossophthalmus gymnophthalmus Pelzeln, Om. Bras., 1870, 274 (Brazilian 



localities; crit. in footnote), 450. 

 [Crossophthalmus] gymnophthalvius Heine and Reichenow, Nom. Mus. Hein. 



Orn., 1890, 276. 

 [Picazuros] gymnophthalmos Gray, Hand-list, ii, 1870, 234, no. 9266. 

 C[olumba] loricata (not of Lichtenstein, 1823) Wagler, Syst. Av., 1827, Columba, 



ep. 53, part. 

 {l)Patagioenas loricata Burmeister, Syst. Ueb. Th. Bras., iii, 1856, 294. 

 {l)Lepidoenas loricata Schlegel, Mus. Pays-Bas, iv, no. 35 (Columbae), 1873, 69 



("BrazU"; "Paraguay"). 



Genus CENCENAS Salvador!. 



(Enosnas Salvadori, Cat. Birds Brit. Mua., xxi, 1893, 248, in text (subgenus). 

 (Type, Columba nigrirostris Sclater.) 



Medium-sized arboreal pigeons (length about 260-325 mm.) with 

 very small bill, greatly restricted bare orbital space, long and strongly 

 rounded tail (more than three-fourths as long as wing), relatively 

 small feet, and very plain coloration (uniform brown above, the 

 head, neck, and under parts purplish brown or drab). 



Bill very small, the exposed culmen shorter than distance from 

 frontal antia to anterior angle of eye, slender {CE. suhvinacea) or 

 stout (CE. nigrirostris); nasal operculi depressed, scarcely if at all 

 tumid, rather narrow; frontal antia but little if any anterior to 

 malar antise. Wing rather long and pointed, the longest primaries 

 exceeding distal secondaries by at least one- third th^ length of wing; 

 third, or second, third and fourth, primaries (from outside) longest, 

 the first equal to or shorter than fifth; longer primaries rather nar- 

 row terminally, the two outer (CE. suhvinacea) or outermost only 

 (CE. nigrirostris) with inner web very faintly sinuated; distal second- 

 aries with exposed portion more than twice as long as exposed por- 

 tion of greater coverts (CE. suhvinacea) or less than one and a quarter 

 times as long (CE. nigrirostris) . TaU more than three-fourths as long 

 as wing (nearly four-fifths as long in CE. suhvinacea) , strongly rounded 

 (the graduation equaUmg about one-ninth the total length in (E. nigri- 

 rostris, nearly one-fifth in CE. suhvinacea), the rectrices rather broad, 



