Vol. XXIX, pp. 95-98 June 6, 1916 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



PRELIMINARY DIAGNOSES OF FIFTEEN APPARENTLY 

 NEW NEOTROPICAL BIRDS. 



BY W. E. CLYDE TODD. 



Further studies of the neotropical birds in the collection of 

 the Carnegie Museum have brought to light a number of addi- 

 tional species and subspecies apparently new to science, which 

 are described herewith, in a preliminary way. The present 

 paper is the fourth of the series to appear in these Proceedings, 

 and the author has again to acknowledge his indebtedness to 

 Mr. Harry C. Oberholser for his kind assistance. Measure^ 

 ments are in millimeters. 



Nemosia pileata hypoleuca subsp. nov. 



DiflFers from all the other known forms of Nemosia pileata in having 

 the entire mider surface pure white in the male, with practically no 

 bluish or grayish suffusion ; size same as in iV. p. nana Berlepsch. 



Type, No. 49,420, Collection Carnegie Museum, adult male; Tucurinca, 

 Santa Marta, Colombia, September 15, 1915; M. A. Carriker, Jr. 



Amblycercus holosericeus centralis subsp. nov. 



Similar in color to Amblycercus holosericeus holosericeus (Lichtenatein), 

 but differing in relative proportions of the wing and tail, the former 

 being decidedly longer than the latter, instead of the reverse. Wing 

 (type), 106; tail, 100; exposed culmen, 32; tarsus, 15.5. 



Type, No. 24,191, Collection Carnegie Musevun, adult male ; Rio Sicsola, 

 Costa Rica, October 12, 1904; M. A. Carriker, Jr. 



Basileuterus cabanisi indignus subsp. nov. 



Similar to Basileuterus cabanisi cabanisi Berlepsch, but middle of 

 crown without, or with but a trace of, Mars yellow, being merely plain 

 dull lemon yellow. 



22— Proc. Biol. Soc. Wash., Vol. XXIX, 1916. (95) 



