VOL. XVII, PP. 113-1 14 MAY 18, 1904 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



TWO NEW SUBSPECIES OF TROPICAL AMERICAN 

 TYRANT BIRDS. 



BY OUTRAM BANGS. 



Of the two tyrant birds here named as new subspecies, one is 

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

 Santa Marta region of Colombia, formerly referred by me to 

 S. cinerea griseaLiSiWT. The other is the extreme northern form 

 of the wide ranging Todirostrum cinereum ( Linn . ) , from southern 

 Mexico . Fortunately the type locality of T. cinereum 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, how 

 ever, through Central America and Panama completely connects 

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

 name many of these should bear. Roughly speaking, specimens 

 from Honduras north may be referred to the northern form and 

 those from Panama south to the southern. 



Serphophaga cinerea cana subsp. nov. 



Type from Chirua, Sierra Nevada de Santa Marta, Colombia, 7000 feet 

 altitude, adult male No. 6125, coll. of E. A. & O. Bangs, collected March 17, 

 1899, by \V. W. Brown, Jr. 



Characters. Most like S. cinerea grisea, but head dull brownish-black, 

 with very large and conspicuous semi-concealed patch of white on crown ; 

 back very pale smoke gray ; under parts nearly uniform grayish white 

 16 PKOC. Bioi.. Soc. WASH. VOL. XVII, 1904. (113) 



