BIRDS OF NOETH AND MIDDLE AMERICA. 335 



under parts nearly white on throat and chest, the former ver}' indis- 

 tinctly and sparseh' spotted, the marking on under parts of body 

 smaller, more spot-like (mostly roundish) and less deep in color than 

 in adults; otherwise essentially like adults." 



Adult female. —Length (skins), 143-149 (146); wing, 91-95.5 (92.7); 

 tail, 54-58.5 (55.5); exposed culmen, 16.5-18 (17.2); tarsus, 19-20 

 (19.5); middle toe, 12.5-14 (13.2).'' 



Panama (Calovevora; Chitra; Castillo) and Costa Rica (San Carlos; 

 Bonilla; Buena Vista; Orosi; San Jose). 



Ozyrhamphus frater Sclater and Salvin, Proc. Zool. Soc. Lond., 1868, 326 (Calo- 

 vevora, Panama; coll. Salvin and Godman); Exotic Orn., pt. ix, pi. 66 

 (2 figs.). — Salvin, Ibis, 1869, 314 (Calovevora, Panama). — Sclater, Cat. Birds 

 Brit. Mus., xiv, 1888, 281 (Calovevora and Castillo, Panama; Costa Rica). — 

 Salvin and Godman, Biol. Centr.-Ain., Aves, ii, 1888, 2. 



[Oxyrhamphus] frater Sclater and Salvin, Nom. Av. Neotr., 1873, 41. 



Oxyrhynch}(s flammiceps (not of Temminck) Lawrence, Ann. Lye. X. Y., ix, 

 1868, 106 (San Jose, Costa Rica).— Frantzius, Joiirn. fiir Ora.. 1869, 304 

 (Orosi, Costa Rica). — Salvin, Proc. Zool. Soc. Lond., 1870, 194 (Calovevora 

 and Chitra, Panama). 



Family TYRANNID.E. 



THE TYRANT FLYCATCHERS. 



Mesomyodian Passeres with the syrinx broncho-tracheal (haploo- 

 phone), syringeal muscles anacromyodous (the vocal muscles 

 inserted on the dorsal end of the bronchial semirings), tarsal envelope 

 exaspidean, or quasi-exaspidean, middle toe united to outer toe for 

 not more (usually decidedly less) than its basal phalanx'' and to 

 inner toe for less than its basal phalanx, with tip of maxilla more or 

 less uncinate, and with nostrils not distinctly, if at all, operculate (if 

 overhung by integument, this membraneous, not corneous). 



Primaries obviously ten, the outermost usually longer than second- 

 aries, though sometimes (in genera Colopteryx, Atalotriccus , and 

 PTiseotnccus^) three or more outer primaries are conspicuously 

 reduced in size. Rectrices twelve, usually nearh' equal in length, 

 but sometimes the lateral, more rarely the middle, pair conspicuously 

 elongated. Bill extremely variable as to shape and relative size, but 

 always with tip of maxilla more or less uncinate; usually the bill is 

 more or less broad and depressed (more or less broadly triangular in 

 vertical profile), with culmen distinctly ridged, sometimes excessively 



o The specimen described had already assumed a considerable portion of the adult 

 plumage, and apparently at first the whole upper parts except remiges and rectrices 

 are pale yellowish flecked or clouded with pale brown. 



& Three specimens. 



c Except in the genus Terenotriccus. 



dPhseotriccus Ridgway. Proc. Biol. Soc. Wash., xviii, Sept. 2, 1905, 209. (Type, 

 Cnipolegus hudsoni Sclater.) 



