440 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ee. Larger (wing averaging much more than 140 mm.); white tips to lateral 



rectrices shorter; occiput and hindneck suffused with bluish gray; 



forehead darker. (Bolivia.) Leptotila verreauxi megalura (extraliraital).o 



dd. Inner webs of remiges dull cinnamon-rufous or vinaceous-cinnamon 



only toward edges. (Western shores and islands of Lake Nicaragua.) 



Leptotila verreauxi nuttingi (p. 450). 



hh. Inner webs of remiges merely edged (more or less indistinctly) with dull 



cinnamon-rufous or cinnamomeous. {Leptotila fulviventris.) 



c. Forehead and anterior under parts more strongly vinaceous; posterior under 



parts more strongly buffy. (Yucatan to southern Vera Cruz and British 



Honduras, and adjacent parts of Guatemala and Chiapas.) 



Leptotila fulviventris fulviventris (p. 451). 



cc. Forehead and anterior under parts less strongly vinaceous (more grayish); 



posterior under parts less buffy. 



d. Under parts darker, upper parts more grayish; smaller (wing averaging 146.5 



in male, 143.8 in female). (Mexico in general, except Yucatan, etc., 



north to southern Texas, south to northern Nicaragua.) 



Leptotila fiUviventris brachyptera (p. 453). 

 dd. Under parts paler, upper parts more brownish; larger (wing averaging 151.9 

 in male, 149.3 in female). (Tres Marias Islands, western Mexico.) 



Leptotila fulviventris capitalis (p. 456). 

 aa. Hindneck not distinctly, if at all, glossed with metallic purple, etc. 

 b. Upper parts grayish brown to olive-brown or bister. 

 c. Occiput and nape grayish brown to olive-brown or bister, nearly concolor \vith 

 back, etc. 

 d. Chest gray. 

 e. Occiput and nape grayish brown (hair brown, deep drab, or benzo brown). 

 (Leptotila cassini.) 

 f. Paler, the chest more purely gray, breast much less strongly vinaceous, 

 upper })arts and lateral under parts less brownish. (Panama and adja- 

 cent portion of northern Colombia.).. Leptotila cassini cassini (p. 456) 

 ff. Darker, the chest less piu-ely gray, breast mort strongly vinaceous, 

 upper parts and lateral under parts more brownish. (Costa Rica to 



Guatemala.) Leptotila cassini ceryiniventris (p. 458). 



ee. Occiput and nape rufescent brown (pecan brown to veroua brown). 

 (Western Panama and western Costa Rica.). Leptotila rufinucha (p. 460). 

 dd. Chest not gray (more or less vinaceous). 

 e. Inner webs of remiges rufous-cinnamon or vinaceous-cinnamon only 

 toward edge; middle of crown bluish gray; under parts with less of white, 

 the Aanaceous of chest more extended ; back, etc., more brownish. (Guianas 

 to Amazon Valley and Colombia.) Leptotila nifaxilla (extralimital).b 



« Leptoptila megalura Sclater and Salvin, Proc. Zool. Soc. Lond., 1879, 640 (Tilotilo, 

 Yungas, Bolivia; coll. Salvin and Godman); Salvadori, Cat. Birds Brit. Mus., xxi, 

 1893, 556, pi. 13. 



b Columba ruf axilla Richard and Bernard, Act. Soc. Hist. Nat. Paris, i, 1792, 118 

 (Cayenne). — Peristera rufaxilla Selby, Natxiralists' Libr., Pigeons, 1835, pi. 24. — 

 [Leptotila\ rufaxilla Swainson, Classif. Birds, ii, 1837, 349. — Leptotila rufaxilla Ber- 

 lepsch and Hartert, Novit. Zool., ix, 1902, 118 (Maipures, etc., Orinoco Valley). — 

 [Leptoptila] rufaxilla Bonaparte, Consp. Av., il, 1857, 73, part. — Leptoptila rufaxilla 

 Sclater and Salvin, Proc. Zool. Soc. Lond., 1867, 591 (Mexiana I., lower Amazon); 

 Salvadori, Cat. Birds Brit. Mus., xxi, 1893, 551. — Leptopila rufaxilla Schlegel, Mus. 

 Pays-Bas, iv, no. 35 (Columbae), 1873, 160 (Brazil; Surinam). — Engyptila rufaxilla 



