Birundinidce, Formicaridce, Tyrannidce, etc. 405 



green ; tail dark cinnamon, the terminal margins of the feathers 

 are of a dull bronze, with a dusky or blackish shading, which also 

 occupies the outer edges of all the feathers for a short distance 

 from their ends, and on the outer edge of the lateral feather it 

 extends to the base ; wiugs brownish purple ; entire under plumage 

 of a uniform dark cinnamon ; bill flesh color for two-thirds of its 

 length, with the end dusky ; feet dark brown. 



Length of skin, 4| in. ; wing, 2|i ; tail, If ; bill, |£. 



Habitat. — Mexico, Tres Marias Islands. 



Specimen in Mus. Smith. Institution, No. 42,538. 



Collected by Col. A. J. Grayson, Mazatlan, whose name I 

 with pleasure confer upon it, commemorative of his labors in 

 behalf of science. 



Remarks. — This fine species is allied to A. cinnamomea, but 

 is much larger, with a stronger and very much wider bill at 

 the base, and broader tail feathers ; it is also much darker 

 below, and has less green in its upper plumage, the crown 

 being of a dull coppery bronze. In A, cinnamomea the entire 

 plumage above is of a rather bright golden green, and the 

 terminal margins of the tail feathers are of a golden bronze, 

 instead of dull coppery bronze, as in the new species. 



APRIL, 1S6T. 30 Ann. Lyc. Nat. Hist. Vol. VIII. 



