BIRDS OF NOETH AND MIDDLE AMEEICA. 587 



dd. Darker, the under parts more uniform in color, under tail-coverts more 

 heavily mottled, and spots on inner weba of primaries less distinct (some- 

 times obsolete). (Ecuador and Peru to southwestern Brazil; south- 

 eastern Brazil?; Paraguay?; Argentina?) 



Nyctibius griseus comutus? (extralimital)." 

 !. A large area of white or buffy or conspicuous spots of the same on proximal middle 



wing-coverts; under wing-coverts uniform sooty black or dark sooty brown. 

 b. Larger (wing 215-265, tail 137-187 mm.); general color deep brown or dusky. 

 c. Larger (wing 265, tail 185-187). (Central Colombia to northern Ecuador.) 



Nyctibius maculosus (extralimital).& 

 cc. Smaller (wing 215, tail 137). (Coast district of southern Brazil.) 



Nyctibius leucopterus (extralimital).<! 



56. Smaller (wing 160, taill27); general color bright rufous. (Colombia to Guiana 



and Peru.) Nyctibius bracteatus (extralimital).<! 



NYCTIBIUS GRANDIS (Gmelin). 



GBAND POTOO. 



Adults {sexes alikeP). — Ground-color of whole plumage, except 

 sser wiog-coverts, remiges, and rectrices but including proximal 

 scondaries, mixed white and buffy, in varying relatiye proportion, 

 imetimes more or less suffused, especially on scapulars, with 

 ^ht rusty or cinnamon-rufous, everywhere irregularly barred and 

 larbled or coarsely vermiculated with dusky; pileiun and hind- 

 3ck more regularly or uniformly barred, and with more or less dis- 



1 {7)CaprimulguscomutusYiei\lot, Nouv. Diet. d'Hist. Nat., x, 1817, 245 (Paraguay; 

 ised on Urutau Azara, Apunt. Parag., no. 308). — {'!)[NyctiMtts] comutus Bonaparte, 

 map. Av., i, 1850, 58. — Nyctibius comutus Tschudi, Fauna Peruana, Aves, 1846, 

 3. — Nyctibius urutau Lafresnaye, L'Echo du Monde Sav., 3° an., no. 175, Oct. 22, 



136, 188 (based on Urutau Azara, Apunt. Parag., no. 308); Mag. de Zool., ana. 7, 



137, cl. ii, not. 83, pi. 82 (monogr.). — ('!)Nyctibius pectoralis (not of Gould?) Sclater, 

 roc. Zool. Soc. Lond., 1860, 79 (near Quito, Ecuador). — {l)Nyctihms griseus griseus 

 ot Caprimulgus griseus Gmelin) Hartert and Venturi, Novit. Zool., xvi, 1909, 224 

 Ihaco, Argentina); Dabbene, Om., Argent., 1910, 421 (Misiones and Santa Ana, 

 rgentina). 



I have not seen specimens from southeastern Brazil, Paraguay, or Argentina, and 



erefore do not know whether they are identical with those from other localities 



entioned or not. 



6 Nyctibius maculosus Bidgway, Proc. Biol. Soc. Wash., xxv. May 4, 1912, 92 



jnbato, Ecuador; coU. Am. Mus. Nat. Hist.). 



c Caprimulgus leucopterus Maximilian, Eeise Bras., ii, 1821, 227 (Caravellas, near 



ihia, Brazil; type now ia coll. Am. Mus. N. H.); Beitr. Naturg. Bras., iii, pt. i, 



30, 311. — Nyctibius leucopterus Des Murs, Icon. Orn., livr. 9, May, 1847, pis. 49, 50; 



later, Proc. Zool. Soc. Lond., 1866, 130 (monogr.); Hartert, Cat. Birds Brit. Mus., 



d, 1892, 694. — [Chordeiles] leucopterus Bonaparte, Consp. Av., i, 1850, 63. 



This species is autoptically unknown to me, and I am therefore imable to give the 



lor-characters wherein it differs from N. maculosus. 



^ Nyctibius bracteatus Gould, Proc. Zool. Soc. Lond., xiv, 1846 (pub. May, 1846), 1 



iogota, Colombia; coll. Mus. Roy. Inst. Liverpool); Sclater, Proc. Zool. Soc. Lond., 



66, 130 (monogr.), 585 (crit.); Hartert, Cat. Birds Brit. Mus., xvi, 1892, 623.— 



yctibius rufus Cabanis, in Schomburgh's Keis. Brit. Guiana, iii, 1848, 711 (Cumaka, 



it. Guiana); Sclater, Proc. Zool. Soc. Lond., 1866, 130 (monogr.), 585 (crit.). 



This species also I have not seen. 



