4*74 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Prionornis platyrhynckus minor Ferry, Pub. 146, Field Mus. N. H., 1910, 263 



(Guayabo, Costa Rica). 

 Prionornis minor Bangs, Proc. Biol. Soc. Wash., xxii, 1909, 32, in text (La Vija- 



gua, Costa Rica). — Carrikek, Ann. Carnegie Mus., vi, 1910, 495 (Costa Rica; 



habits). 

 [Prionornis] minor Sharpe, Hand-list, ii, 1900, 76. 



ELECTRON PLATYRHYNCKUS SUBOLES Nelson. 



DARif N MOTMOT. 



Similar in extensively bluish chin to E. p. minor, but color of back, 

 etc., much purer green (deep Hay's green), upper surface of tail and 

 outer webs of primaries greenish blue (between motmot blue an d china 

 blue) , posterior underparts Hght greenish blue or bluish green (niagara 

 green), color of pileum and hindneck Hghter (dull russet-tawny), and 

 bUl relatively longer and narrower. 



Adult male. — ^Length (skin), 322; wing, 117; tail, 188; exposed 

 culmen, 42 (40.5); tarsus, 18; middle toe, 13. S.'^ 



Eastern Panama (Cana, Darien) ; Colombia (Rio Atrato ; Rio 

 Nercua; Remedios, Antioquia) ? 



{'})Prionirhynchus platyrhynckus (not Momotus platyrhynchiLS Leadbeater) Sclater 

 and Salvin, Proc. Zool. Soc. Lond., 1879, 534 (Remedios, Antioquia, Colom- 

 bia). — Sharpe, Cat. Birds Brit. Mus., xvii, 1892, 315, pai't (Remedios, 

 Colombia). 



C?) Prionornis platyrhynckus Salvin and Godman, Biol. Centr.-Am., Aves, ii, 

 1895, 467, part (Rio Nercua, Colombia). 



Electron platyrhynckus suboles Nelson, Smithson. Misc. Coll., vol. 60, no. 3, Sept. 

 27, 1912, 5 (Cana, Darien, Panama, 2,000 ft.; coll. U. S. Nat. Mus.). 



ELECTRON CARINATUS CARINATUS (Du Bus). 



KEEL-BILLED MOTMOT. 



Adults (sexes alike). — Forehead (more or less extensively) dull 

 cinnamon-rufous to cinnamon; superciliary region bright turquoise 

 or cserulean blue, Ught greenish blue, or (more rarely) cobalt or 

 ultramarine blue; rest of pdeum, deep olive-green or olivaceous 

 parrot green, passing into lighter and brighter olive-green or oUva- 

 ceous parrot green on hindneck, back, scapulars, rump, and upper 

 tail coverts, the wing coverts and secondaries similar but usually 

 purer (less ohvaceous) green, the outer webs of primaries duller and 

 more bluish green; tail ohvaceous parrot green (sometimes inclining 

 to bluish green), the terminal spatules of middle rectrices bluish 

 green or greenish blue, broadly tipped with dull black; loral, orbital, 

 and auricular regions uniform black ; chin and upper throat dull ver- 

 digris green; rest of underparts plain ohvaceous cinnamon or light 

 ohve-green, more or less tinged or washed with cinnamon, the center 



O' One specimen. 



