PTILOGONYS. 



413 



(No. 30,719.) Plumage compact ; rather silky. Wing considerably shorter 

 than the tail, which is almost even, slightly emarginated, broad and some- 

 what fan-shaped, the feathers widening from base to near tip ; the central 

 only with parallel edges to the rounded tip, and rather shorter than the 

 lateral. First quill much less than half the 2d, contained about three times 

 and a half in the longest (5th), falcate and rather acute; the 2d equal to 

 10th ; the 3d about equal to 7th ; the ends of the 2d and 3d quills attenuated 

 and acute. Tarsi distinctly scutellate ; rictal bristles moderate. 



Predominant color dark bluish-ash, scarcely lighter below ; the head all 

 round pale ash ; the forehead, chin, and side of lower jaw almost white ; the 

 cheeks and the nape (mostly concealed by the incumbent crest) smoky ash ; 

 eyelids white ; lores and space below eye blackish. Quill- and tail-feathers 

 glossy greenish-black, varied above only by a narrow border of the back- 

 color, the quills abruptly edged internally with white, the axillars varied 

 with the same, the tail feathers having the middle third of their inner webs 

 white, in a rectangular patch. Anal region behind, and crissum rich Indian 

 or egg yellow ; the flanks posteriorly olive yellow. Tibiag and middle of belly 

 white. Bill and legs black. "Iris carmine" (Xanlus). 



(No. 30,719.) Total length, 8.00; wing, 3.75; tail, 4.30; width of outer 

 feather, .50 ; difference between 10th and longest quills, .80 ; exposed portion 

 of first primary, .78, of 2d, 1.90, of longest (Gth) (measured from exposed 

 base of 1st primary), 2.90 ; length of bill from forehead, .55, from nostril, .28, 

 along gape, .73 ; tarsus, .60 ; middle toe and claw, .65, claw alone, .20; hind 

 toe and claw, .45, claw alone, .22. 



Immature birds, perhaps females, differ in having the ashy tints 

 of the body replaced by dirty brownish, of an umber or sepia tint, 

 and traces of the same are not unfrequently seen in the more per- 

 fectly plumaged specimens. Indistinct, scarcely appreciable spots 

 of olive green are sometimes to be seen in the feathers of the back. 



Ptilogonys caudatus. 



Ptilogonys caudatux, Cabanis, Jour. 1860 (May, 1861), 402 (Costa Rica). 

 Hah. Mountains of Costa Rica. 



(No. 35,247.) Tail much graduated ; the central feathers prolonged, and 

 tapering gently from the middle to a rounded point ; the others successively 

 shorter ; the lateral about two-thirds the length of central ; feathers nar- 

 rower than in cinereus (about .40), and scarcely widening from base to end. 



