470 Descriptions of JVew Species of American Birds. 



without the grayish character which prevails in the uncler- 

 plumage of its allies. 



7. Myioclyuastes superciliaris. 



Male. Upper plumage greenish olive, the crest gamboge yellow, 

 the front, sides of the crown, and ends of the yellow crest feathers 

 dusky olive, the front mixed with grayish white ; a broad super- 

 ciliary white stripe runs from the bill to the bind head ; the lores 

 and sides of the head black, adjoining the throat dusky olive ; 

 there is a short white stripe on the side of the head, under the ear 

 coverts ; the upper tail coverts are of a darker olive than the back, 

 and edged with ferruginous ; tail brown with light rufous margins 

 to the feathers ; entire under plumage gamboge yellow, except the 

 chin, which is grayish white ; the wing coverts olive brown, the 

 primary and secondary quills blackish brown, margined narrowly 

 with ferruginous, the tertiaries are edged with yellowish white ; 

 under Aving coverts yellow, inner margins of quills salmon color ; 

 bill and feet black. 



Length 9 in. - y wing 4^ ; tail 3| ; bill || ; tarsi f . 



Habitat. — Costa Eica, Barranca. Collected by F. Carmiol, 

 April 10, 1865. 



Type in Mus. Smith. Institution, No. 41,129. 



Remarks. — In size and coloration this species most resem- 

 bles 31. chrysocephalus (Tsch.) from Peru, but in that the bill 

 is stouter, the feathers surrounding the crest and on the sides 

 of the head are of a clear ash color, the throat is buffy or pale 

 salmon, and the feathers of the breast have their centres 

 olivaceous. 



8. Aglaeactis olivaceocauda. 



Upper plumage of a fine dark brown, with the lower part of the 

 back and the rump brilliant violet (looked at reversely), changing 

 to green on the lower portion ; on the hind neck the feathers are 



