BIRDS OF NORTH AND MIDDLE AMERICA, 793 



Adult fern ale. —Length (skins), 70-78 (75) ; wing, 41 .5-46 (44.5) ; tail, 

 23.5-26.5 (25); exposed culmen, 7.5-9 (8.3); tarsus, 12.5-13.5 (13); 

 middle toe, 7.8 (7.5)." 



Costa Rica (Angostura ; Jimenez) ; Panama (Lion Hill Station) ; 

 northwestern Ecuador (Paramba).'' 



Tyrannulus brunneicapillus Lawrence, Ibis, Jan., 1862, 12 (Panama; coll. G. N. 



Lawrence); Ann. Lye. N. Y., vii, 1862, 473 (Lion Hill, Panama R. TL ), ix, 



1868, 111 (Angostura, Costa Rica). — Sclater and Salvin, Proc. Zool. Soc. 



Lond., 1864, 350 (Lion Hill; crit.)— Sclater, Cat. Birds Brit. Mus., xiv, 1888, 



129.— Frantzius, Journ. fur Orn., 1869, 307 (Costa Rica).— Salvin and 



GoDMAN, Biol. Centr.-Am., Aves, ii, 1888, 32. 

 T[yrannulus] brunndcapillus Salvin, Ibis, 1872, 314 (Costa Rica). 

 [Tyrannulus] brunneicapillus Sclater and Salvin, Nom. Av. Neotr., 1873, 48. 

 [Elcdnia] brunneicapilla Gray, liand-Mst, 1869, 356, no. 5411. 

 Ornithion brunneicapillum Hartert, Novit. Zool., v, 1898, 487 (Paramba, n. w. 



Ecuador; crit.). — Berlesch, Proc. Fourth. Internat. Orn. Cong., 1907.492. 

 \Orn'lhion] brunneicapilluin Sharpe, E[and4ist, iii, 1901, 120. 

 Microfriccns semiflavus brunneicapillits Ridgway, Proc. Biol. Soc. Wash., xviii, 



Sept. 2, 1905. 210. 



Genus TYRANNULUS Vieillot. 

 Tyrannulus Vieillot, Analyse, 1816, 31. (Type, Sylvia data Latham.) 



Very small Cotingidse (wing less than 55 mm.) with tail about 

 four-fifths as long as wing, outer toe shorter than inner toe, basal 

 phalanx of middle toe wholly united to outer and at least half united 

 to inner toe, tarsal envelope essentially pycnaspidean, and with a 

 bushy crest of bright yellow margined with dusky. 



Bill very small, less than half as long as head, its width at frontal 

 antise about equal to or slightly less than its depth at same point 

 and equal to more than two-thirds the distance from nostril to tip 

 of maxilla; exposed culmen shorter than middle, but longer than 

 inner, toe without claw, distinctly ridged, straight for most of its 

 length, gradually decurved terminall}^, the tip of maxilla not strongly 

 uncinate; gonys longer than mandibular rami, slightly convex; max- 

 illary tomium very faintly sinuated, distinctl}^ but minutely notched 

 subterminally. Nostril exposed, ver}^ small, circular, near center of 

 nasal foss?e, wholly surrounded by membrane. Kictal bristles ob- 

 vious but small, the feathers of chin and frontal antitie with small 

 bristly points. Wing moderate, rounded, the longest primaries 

 exceeding secondaries by much more than tength of exposed culmen 

 but by less than length of middle toe with claw; seventh or seventh 

 and eighth primaries longest, ninth ecjual to or longer than sixth, 

 tenth (outermost) about equal to fourth. Tail about four-fifths as 

 long as wing, even or very slightly double-rounded, the rectrices 

 rather broad and not wader terminally than basally. Tarsus about 



o Three specimens. ^According to Hartert (Novit. Zool., v, 1898, 487). 



