Bulletin of the United States National Museum, Numéro 50,Partie 3

adult females Adult male.-Length skins Arizona auricular region BAIRD barred basal bill black Biol Birds Brit blackish blue bluish BONAPARTE Bost breeding BREWER brownish gray buffy Bull CABANIS Centr.-Am Check List chest Club coll color Corvus Costa Rica COUES crit Cruz darker decidedly depth of bill descr dull duller dusky exposed culmen feathers frontal antiæ grayish brown Guatemala hallux hindneck Hirundo Hist Ibis Island Journ length skins less Linnæus Lond long as wing maxilla Mexico middle toe Neotr Nutt Oaxaca ORNITHOLOGISTS Pacific R. R. Surv paler Panama Phila pileum plumage Proc rectrices remiges RIDGWAY rump Santa scapulars SCLATER and SALVIN shorter sides and flanks sides of head sooty species specimens streaked superciliary stripe synonymy tarsus Texas throat Thryothorus tinged toe without claw tomium Troglodytes U. S. Nat upper tail-coverts Vera Cruz Vieillot Vireo Vireosylva whitish wing-coverts yellow Zool