312 



KEVIEW OF AMEEICAS BIRDS. 



[PAET 



STBLGHDOPTERYX, Baikd. 



Stelgidopteryx, Baied, Birds N. Am. 1858, 312. (Type Eirundo serri- 

 pennis, AuD.) 

 Bill rather small ; nostrils oval, superior, margined behind, but scarcely 

 laterally by membrane, but not at all overhung ; the axes of the outline con- 



concealed white, but dark gray in the middle. Beneath white, all the 

 feathers dark plumbeous at base ; the breast with a grayish shade across it 

 owing to the fact that the feathers there are grayish-brown, rather narrowly 

 edged with white, less pure than on the throat, and allowing this gray to show 

 through as well as among the whitish. The crissal feathers immediately 

 behind the anus are white ; the longer ones are white, or grayish-white at 

 base, and then blackish, glossed with steel blue at the end. The axillars and 

 inside of wings are brownish-gray. The sides of body under the wings are 

 slightly soiled with gray. Bill black ; feet apparently flesh color. 



(No. 21,039.) Total length, 5.00 ; wing, 3.90 ; tail, 2.55, perpendicular depth 

 of fork, .40 ; difference of quills, 1.63 ; length of bill from forehead, .40, from 

 nostril, .19, along gape, .51, width, .40 ; tarsus, .50 ; middle toe and claw, .60, 

 claw alone, .16 ; hind toe and claw, .38, claw alone, .17. 



This species appears quite distinct from the cyanoleuca of Brazil, in slightly 

 larger size, much larger bill and feet, absence of white in the interscapular 

 feathers, and of bluish gloss on the lesser wing coverts ; lighter color of bases 

 of feathers below ; grayish breast, the feathers less tipped with white ; white 

 feathers, behind the anus, and whitish bases of the rest of crissal feathers (not 

 black) ; lighter tibiae,- etc. The lateral tail feathers are rather narrower, and 

 not acuminated or attenuated at the end — the outline of inner web towards 

 the end being convex, not concave. 



It is a question whether this is not the real H. cyanoleuca, of Vieillot, as 

 based on Azara's description. If so, the Brazilian cyanoleuca will take for 

 name one of its synonyms. 



Atticora murina. 



??Hirutido cinerea, Gm. S. N. I, 1788, 1026 (based on VHirondellede 

 Perou, Beiss. II, 1760, 498, ex FeuillS Journ. Obs. 1725). — Atticora 

 cinerea, Solatee, Catal. 1861, 39, no. 237. 



Petroclielidon murina, Cassin, Pr. A. N. Sc. 1853, 370 (Ecuador). — 

 ScLATEB, P. Z. S. 1860, 74. 



?Atticora cyanophma, Cabanis, Jour. Dm. 1861, 92 (Bogota). 

 Hab. Andes of South America. 



I am by no means satisfied that the bird of Brisson is the present species, 



