408 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. XIII. 



Monasa pallescens pallescens Cassin. PALLID NUN BIRD. 



Monasa pallescens CASSIN, Proc. Acad. Nat. Sci. Phila., 1860, p. 134 (Cordilleras 



of the Rio Truando, northwestern Colombia) ; RIDGWAY, Bull. U. S. Nat. 



Mus., No. 50, VI, 1914, p. 397; HELLMAYR, Proc. Zool. Soc. Lond., 1911, p. 



1197 (Juntas, Rio Tamana). 

 Monasa pallescens pallescens CHAPMAN, Bull. Am. Mus. Nat. Hist., XXXVI, 



1917, p. 345 (Salaqui; Iguamiando; Baudo; Alto Bonito, Colombia). 



Range: Northwestern Colombia (Rio Truando; Truando Falls; Rio 

 Atrato (Ridgway); Atrato and upper San Juan Valleys (Chapman)). 



Monasa pallescens sclateri {Ridgway). SCLATER'S PALLID NUN BIRD. 



Monasa sclateri RIDGWAY, Proc. Biol. Soc. Wash., XXV, 1912, p. 89 ("Bogotd"); 



Id., Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 394, in key. 

 Monasa pallescens sclateri CHAPMAN, Bull. Am. Mus. Nat. Hist., XXXVI, 1917, 



P- 345 (Puerto Valdivia, and 20 miles west of Honda, Colombia). 



Range: Central Colombia ("tropical zone in the lower Cauca and 

 Magdalena Valleys," Chapman). 



Monasa pallescens minor Nelson. MARRAGANTI NUN BIRD. 



Monasa pallescens minor NELSON, Proc. Biol. Soc. Wash., XXVI, 1913, p. 67 



(Marraganti, eastern Panama). 

 Monasa minor RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, p. 398. 



Range: Southeastern Panama. 



Monasa similis Nelson. CERRO AZUL NUN BIRD. 



Monasa similis NELSON, Smiths. Misc. Coll., LVI, No. 37, 1912, p. I (Cerro Azul, 

 Panama, 800 ft. alt.); RIDGWAY, Bull. U. S. Nat. Mus., No. 50, VI, 1914, 

 P- 399- 

 Range: Eastern Panama (Cerro Azul, Canal Zone). 



*Monasa nigrifrons (Spix). BLACK-FRONTED NUN BIRD. 



Bucco nigrifrons SPIX, Av. Bras., I, 1824, p. 53, pi. 41, fig. 2 ("insylvis flum. 



Solimoens")- 



Monacha nigrifrons SCLATER, Mon. Jacamars and Puff-birds, 1882, p. 159, pi. 

 54; Id., Cat. Bds. Brit. Mus., XIX, 1891, p. 206 (Rio Tocantins; Chapada; 

 Matto Grosso, Brazil; Bolivia; Yquitos; Pebas; Lower Ucayali, Peru). 



Lypornix unicolor WAGLER, Syst. Av., 1827, Lypornix, sp. 2. 



Monasa nigrifrons SCLATER, Ann. & Mag. Nat. Hist., (2), XIII, 1854, p. 481; 

 ALLEN, Bull. Am. Mus. Nat. Hist., V, 1893, p. 135 (Matto Grosso); GOOD- 

 FELLOW, Ibis, 1902, p. 214 (Coca, Ecuador); HELLMAYR, Abh. K. Bayer 

 Akad. Wiss., XXII, 1906, p. 599 (Spix's Types); Id., Nov. Zool., XV, 1908, 

 p. 86 (Goyaz, Brazil); Id., XVII, 1910, p. 393 (Calama, Rio Madeira); 

 SNETHLAGE, Bol. Mus. Goeldi, VIII, 1914, p. 241 (Rio Guama; Rio Capim; 

 Rio Tocantins; Rio Iriri; Rio Tapajoz; Rio Purus; Rio Jamunda, etc. Bra- 

 zil); CHAPMAN, Bull. Am. Mus. Nat. Hist., XXXVI, 1917, p. 345 (La Mor- 

 elia, southeastern Colombia); HELLMAYR, Abh. K. Bayer. Akad. Wiss., 

 Munchen, XXVI, 2, 1912, p. 95 (Para District). 



