414 



REVIEW OP AMERICAN BIRDS. 



["part I. 



First quill contained not quite three and a lialf times in longest ; the 2d 

 rather shorter than 10th ; the 3d a little shorter than 7th ; the 1st, 2d, and 3d 

 moderately attenuated at end ; the 1st falcate, acute. 



Upper surface of body and wings, with jngulum and breast, bluish-ash. 

 Head and neck all round, with nape belly and flanks, yellowish-green, paler 



PtUogonys caudatus, Cabanis. (Costa Rica.) 



on throat ; the top of head, from bill, pale ashy ; chin and forehead anterior to 

 eyes lighter, and tinged with yellowish ; the crissum and narrow ring round 

 eye egg-yellow. Tibiae and concealed tuft on thighs whitish. Quill- and tail- 

 feathers glossy greenish-black ; the former edged internally with whitish, the 

 four or five outer tail feathers with a patch of white in the middle third of 

 inner webs, diminishing in size towards the interior one ; the outermost with 

 the outlines following nearly the line of the fibres of the feather, or lozenge- 

 shaped, not rectangular. On the fourth feather the spot does not reach the 

 inner edge of the feather, and is still more reduced, sometimes wanting in 

 the fifth. Outer edges of quills very narrowly like back. Bill and feet 

 black. Iris "bluish-yellow" {Carmiol). 



(No. 35,247, ;> .) Total length, 10.60 ; wing, 3.80 ; tail, 5.50 ; middle feather, 

 1.90 longer than lateral ; difference of 10th and longest quills, .80 ; exposed 

 portion of 1st primary, -.80, of 2d, 1.70, of longest (5th and 6th) (measured 

 from exposed base of 1st primary), 2.80; length of bill from forehead, .60, 

 from nostril, .29, along gape, .75 ; tarsus, .70 ; middle toe and claw, .70, claw 

 alone, .23 ; hind toe and claw, .50 ; claw alone, .25. 



The adults of the two sexes do not appear to differ in color. In 

 younger birds (No. 35,245), however, the bluish-ash is replaced by 

 the yellowish-green, of which color is the entire body and head. In 

 still younger birds there is a strong tinge of brown. In No. 35,245, 

 too, the crest, instead of being broad and full, the lateral feathers as 

 long as central, is pointed, owing to the central feathers being much 

 longer, and more distinct in outline, or rather the lateral more abbre- 

 viated, in this respect much like the crest of Phxnopepla nitens. 



