354 BULLETIN no, UNITED STATES NATIONAL MUSEUM. 



bb. Tail ochraceous; upper tail-coverts not barred; sides and flanks not barred; 

 general coloration paler and size larger (wing of male, 82-92). {Onychorhyn- 

 chus mexicanus.) 

 c. Slightly larger and paler, with Inll relatively longer and narrower. (Southern 



Mexico to Guatemala.) Onychorhynchus mexicanus mexicanus Cp. 354) 



cc. Slightly snTaller and darker, with relatively shorter and liroader l)ill. (Nica- 



rao^ua to Colombia.) Onychorhynchus mexicanus fraterculus (p. 356) 



aa. Chest not barred. 



b. Back, etc., brown; under parts and tail ochraccous-lnifi". (Brazil.) 



Onychorhynchus swainsoni (extralimital) o 

 bb. Back, etc., raw sienna or clay color; unTler parts and tail orange-ochraceous or 

 ochre-yellow. (Western Ecuador.) 



Onychorhynchus occidentalis (extralimital) & 



ONYCHORHYNCHUS MEXICANUS MEXICANUS (Sclater). 

 MEXICAN ROYAL FLYCATCHER. 



Adult male. — Conspicuous fan-shaped crest orange-vermilion to 

 scarlet-vermilion, the longer feathers broadly tipped with metallic 

 bluish violet or steel blue (more rarely greenish blue) and black, the 

 latter m form of a triangular, cordate, or roundish subterminal spot ; 

 many of the smaller feathers with a much smaller, roundish terminal 

 spot of black; occiput, hindneck, back, upper rump, scapulars, and 

 wings plain olive-brown, the middle (sometimes also some of the 

 lesser) wing-coverts with a small triangular terminal spot of buff, 

 the greater coverts similarly marked or narrowly tipped with the 

 same, the tertials margined terminally with buff, immediately pre- 

 ceded by a dusky line ; lower rump and upper tail-coverts buff -yellow 

 or yellowish buff; tail tawny-ochraceous, passing gradually into 

 brownish terminally, the rectrices with a narrow terminal margin of 

 buff; chin and throat veiy pale yellowish buff or buffy whitish; rest 

 of under parts ochre-yellow (deeper and more ochraceous on sides, 

 flanks, and under tail-coverts), the chSst more or less distinctly barred 

 with olive-brown, which on sides of chest becomes nearly uniform; 

 maxilla dusky horn color, mandible paler (yellowish in life); iris 

 brown ;'^ legs and feet pale brownish (fleshy yellow in life);*' length 

 (skins), 166-179 (174); wing, 87.5-91.5 (89.2); tail, 71-75 (73.6); 

 exposed culmen, 25-27 (26); tarsus, 17-17.5 (17.1); middle toe, 

 11-12 (11.6).'^ 



Immature male. — Similar to the adult male but color of crest more 

 orange, back and scapulars more or less barred with dusky and buffy, 

 upper tail-coverts with a few narrow dusky bars or small spots, and 

 rectrices with a subterminal bar of dusky. 



aMusdvora swainsoni Pelzeln, Sitz. Ak. Wiss. Wien, xxxi, 1858, 326; Sclater, 

 Cat. Birds Brit. Mus., xiv, 1888, 192. 



bMjisdvora ocddentalis Sclater, Proc. Zool. Soc. Lond., 1860, 282 (Babahoyo, w. 

 Ecuador; coll. P. L. Sclater); Cat. Birds Brit. Mus., xiv, 1888, 194, pi. 15.— Ony- 

 chorhynchus ocddentalis Oberholser, Auk, xviii, Apr., 1901, 194. 

 • cgumichrast, manuscript. d Eight specimens. 



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