472 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



bb. Color of pileum, etc., lighter and duller, less castaneous; chin distinctly and 



extensively greenish blue or bluish green. 



c. Back, etc., more olivaceous green (deep hellebore green to deep forest green), 



posterior under parts light olivaceous green (American green to pi.stachio 



green). (Costa Rica to Canal Zone).. Electron platyrhynchus minor (p. 472). 



cc. Back, etc., purer green (deep Hay's green), posterior under parts light l)luish 



green (Niagara green). (Eastern Panama; Colombia?) 



Electron platyrhynchus suboles (p. 474). 

 aa. Pileum and hindneck gi'een; a bright blue superciliary patch; foreneck, chest, 

 and breast green or olive. (Electron carinatus.) 

 b. Upper parts more olivaceous green; under parts more or less suffused (some- 

 times strongly) with tawny. (Southeastern Mexico to Honduras.) 



Electron carinatus carinatus (p. 474). 



66. Upper parts grass green; under parts slightly olivaceous green, without tawny 



suffusion. (Northwestern Costa Rica). .Electron carinatus viridis (p. 476). 



ELECTRON PLATYRHYNCHUS MINOR (Hartert). 



LESSER BKOAD-BILLED MOTMOT. 



Similar to E. p. platyrliyncTius ,°^ but color of head, neck, and chest 

 lighter (less castaneous), chin more distinctly and more extensively 

 bluish, and size averaging smaller. 



Adults (sexes alike). — Pileum, hindneck, sides of neck, and subauricu- 

 lar and malar regions, plain dull cinnamon-rufous, passing gi'aduaUy into 

 a very slightly paler but similar color on throat, foreneck, and chest; 

 chin and upper throat dull verdigris green; loral, orbital, and auric- 

 ular regions uniform black; a tuft of large, elongated, rather broad 

 black feathers on center of foreneck; back, scapulars, rump, and 

 upper tail-coverts plain olivaceous parrot green, the wing coverts and 

 secondaries purer (less olivaceous) green, the outer primaries, 

 together with primary coverts and alula more bluish green; tail 

 bluish green proximally, passing into greenish blue distally,the middle 

 rectrices broadly tipped with dull black ; shafts of remiges and rectrices 

 glossy black; under surface of tail dark slate or blackish slate; breast, 

 abdomen, sides, flanks, and under tail-coverts plain dull bluish green 

 (nearly verdigris), usually tinged, more or less, especially on upper 

 breast, with oil green; bill black, paler at tip; legs and feet blackish 

 (in dried skins). 



Adult male. —Length, (skins), 292-325 (309); wing, 110-118 (112.8); 

 tail, 155-192 (171); exposed culmen, 35-40 (38.1); tarsus, 17-18.5 

 (17.8); middle toe, 13-15.5 (15.1).^ 



a See p. 471. b Fourteen specimens. 



