BIBDS OF NORTH AND MIDDLE AMERICA. 399 



272-275 (273.5); wing, 131.5-132 (131.7); exposed culmen, 35-36.5 

 (35.7); tarsus, 22-22.5 (22.2); outer anterior toe, 17.5-18 (17.7).« 

 Southeastern Panama (Marraganti) . 



Monasa pallescens minor Nelson, Proc. Biol. Soc. Wash., xxvi, Maxch 22, 1913, 

 67 (Marraganti, eastern Panama; coll. U. S. Nat. Mus.). 



MONASA SIMILIS Nelson. 



CERKO AZtL NUN BIRD. 



Similar to M. pallescens in restriction of the white or pale rusty- 

 frontal area to anterior portion of forehead, lores, and supranasal 

 plumes (the head otherwise entirely black), but color of back, scapu- 

 lars, rump, wing-coverts, and under parts of body much darker (the 

 back dark slate instead of slate-gray, the wing-coverts uniform slate- 

 gray instead of hght gray posteriorly, becoming still paler — ^no. 8 or 

 no. 9 gray — anteriorly) . 



AdvM female. — ^A frontal area, involving anterior portion of fore- 

 head, supranasal plumes, and greater part of lores, duU white or pale 

 rusty brownish; rest of head, together with neck, all round, uniform 

 black, passing into slate-black on upper chest; back, scapulars, rump, 

 and upper tail-coverts plain slate color, the first darker anteriorly; 

 wing-coverts uniform deep bluish slate-gray; remiges black, faintly 

 glossed with greenish, the proximal secondaries narrowly edged with 

 slate color, increasing in extent to the innermost, which are mostly 

 slate color; tail shghtly glossy bluish black; under parts of body 

 (posterior to chest) plain slate-gray, very slightly darker anteriorly, 

 where rather abruptly defined against the slate-black of chest, the 

 under tail-coverts darker; under wing-coverts clear slate-gray, paler 

 than under parts; bill bright red ; legs and feet dusky (in dried skLu) ; 

 length (skin), 281; wing, 140; tail, 127; exposed culmen, 40; tarsus, 

 20; outer anterior toe, 19.* 



Eastern Panama, (Cerro Azdl, Canal Zone). 



{l)Monasa pallescens (not of Cassin?) Salvadoei and Pesta, BoU. Mub. Zool., 

 etc., Torino, xiv, 1899, no. 339, p. 8 (Puntade Sabana, Panama). 



Monasa similis Nelson, Smitheon. Misc. Coll., vol. 56, no. 37, Feb. 16, 1912, 1 

 (Oerro Azul, Panamd, 800 ft. alt.; coll. U. S. Nat. Mus.). 



Genus NONNULA Selater. 



Nonnula Sclateb, Proc. Zool. Soc. Lond., 1853, 124. (Type, Bitcco ruheaila 



Spix.) 

 Microtrogon <= Bertoni, Aves Nuevas del Paraguay, 1901, 41. (Type, M. ful- 



vescens Bertoni=JBucco rubecula Spix.) 



Very small Bucconidffi (length about 125-145 mm.) with the rather 

 slender, slightly decurved, slightly compressed bill equal to or slightly 



o Two specimens. 



6 One specimen (the type). 



« MiKpbc, small; +Trogon {zpchj-ai, I gnaw, I eat). (Bertoni.) 



