478 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



EUMOMOTA S0PERCIL1OSA SUPERCILIOSA (Sandbach' 



TTJHQTrOISE-BROWED MOTHOT. 



Adults {sexes alike). — ^Median portion of pileum plain dark olive- 

 green to dull grayish green, the lateral portions (supraloral and super- 

 ciliary regions), broadly, br^ht bluish white or pale turquoise or nile 

 blue, the feathers of these areas elongated and stiffened; loral, sub- 

 orbital, and auricular regions deep black, the first two bordered below 

 by spots and streaks of bright light turquoise or nile blue; a post- 

 ocular area of chestnut; hindneck, scapulars, rump, and upper tail- 

 coverts, bright olive-green; interscapular region cinnamon-rufous, 

 usually more or less tinged with (sometimes considerably obscured 

 by) olive-green; wing-coverts purer (less olivaceous) green; second- 

 aries light greenish blue or bluish green (dull nile blue or glaucous 

 green), abruptly tipped with black (except the innermost one), the 

 distal secondaries with basal portion also black; alula greenish blue 

 or bluish green (like secondaries), tipped with black; primary coverts 

 black; primaries greenish blue or bluish green passing into dull black 

 terminally; tail bluish green or greenish blue, the middle rectrices with 

 terminal half of the spatidate tip black; chin light green or bluish 

 green, streaked with black; sides of throat and foreneck, together 

 with malar region (except anterior portion) and sides of neck, plain 

 olive-tawny or tawny olive-greenish; median portion of throat and 

 foreneck black, forming a large cuneate area having its apex on upper 

 throat, this black area margined along each side by a line of elongated 

 narrow feathers of a beautiful light turquoise or nile blue; chest and 

 upper breast plain greenish olive-tawny, showing more or less of the 

 %ht cinnamon-rufous of the underlying portion of the feathers; rest 

 of under parts uniform cinnamon-rufous; under wing-coverts ochrsr 

 ceous buff; bill black; iris brown; legs and feet grayish black. 



Young. — ^Essentially like adults, but general coloration paler and 

 duller; interscapular region less distinctly rufescent; feathers of 

 superciliary tufts much shorter; throat without any black and with 

 only a few light greenish-blue feathers (perhaps none in younger 

 birds); middle pair of rectrice with webs continuous, though narrow 

 in middle portion. 



Adult TTiffiZe.— Length (skins), 343-386 (365); wing, 104.6-118.5 

 (112.3); tail, 190-219 (206.1); exposed culmen, 39-42 (40.5) ; tarsus, 

 20-23 (20.9); middle toe, 14.5-19 (17).° 



« Twelve specimens. 



