Vol. XVII, pp. 113-1 14 



May 18, 1904 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



T\\'(l XKW SUBSPECIES OF TPvOPICAL AMEPvICAN 



TYRANT BIRDS. 



BY OUTRAM BANGS. 



Of the two tyrant birds here named as new suh.species, one is 

 a well-marked form of Serphophaga cinerea (Striekl.) from the 

 Santa Marta region of Colombia, formerly referred by me to 

 S. rint'ira (/riscd '[A\^xv. The otlier is the extreme northern form 

 of tlu' wide ranging Tddirosfrinn riiiciruiu (Linn.), from southern 

 Mexico . F( )rtimately the type locality of T. cinereu in — Surinam — 

 is well toward the southern end of the range of the species, and 

 extreme northern and southern .specimens when compared to- 

 gether are different enough. A long chain of intergrades, hoAV- 

 ever, through Central America and Panama completely connects 

 the two extreme races and it is no easy matter to say Avhich 

 name many of these should bear. Roughly speaking, specimens 

 from Hon<luras nortli may lie referred to the northern form and 

 those from Panama south to the southern. 



Serphophaga cinerea cana snbsp. nov. 



Ti/jx' from Cliirua, Sierra Nevada de Santa Marta, C()loiiil)ia, 7000 feet 

 altitude, adult male No. 6125, coll. of E. A. & 0. Banjos, collected March 17, 

 1S99, by \V. W. Brown, Jr. 



Ch'irartern. — Most like S. chier f a grist'o, hut head dull brownish-black, 

 with very larj^e and consj)icuous pemi-concealed patcli of white on crown; 

 bac-k verj' pale smoke gray ; under parts nearly uniform grayish white — 

 Ifi— Phoc. Bioi,. Soc. Wash. Vol. XVII, 190-1. (113) 



