114 Proceedings of the Biological Society of Washington. 



Cistothorus aequatorialis fulvescens, subsp. nov. 



Similar to Cistothorus cequatorialis cequatorialis Lawrence of Ecuador and 

 the Central Andes of Colombia, but decidedly more rufescent throughout, 

 the general tone of the upper parts nearer light Brussels brown than deep 

 tawny olive; and the under parts more strongly shaded with cinnamon 

 buffy, with little or no white medially. 



Type, No. 58,258, Collection Carnegie Museum, adult male; Paramo 

 Guerrero, Santander, Colombia, October 13, 1916; M. A. Carriker, Jr. 



Leucolepis lawrencii assimilis, subsp. nov. 



Similar to Leucolepis lawrencii lawrencii (Sclater), but generally paler; 

 upper parts nearer raw umber than mummy brown; and lower breast and 

 abdomen decidedly more grayish, less brownish. 



Type, No. 63,860, Collection Carnegie Museum, adult female; Sautata, 

 Rio Atrato, Colombia, January 22, 1918; M. A. Carriker, Jr. 



Leucolepis phseocephalus propinquus, subsp. nov. 



Decidedly paler in general coloration than Leucolepis ph&ocephalus 

 phceocephalus (Sclater), the upper parts Prout's brown instead of deep 

 chestnut brown, and the under parts correspondingly paler also, with the 

 throat in more decided contrast with the rest of the under surface. 



Antioquia specimens, representing Cyphorhinus brunnescens Sharpe, 

 while tending slightly towards the characters of this pale northern race, are 

 obviously referable to the typical form, described from Ecuador. 



Type, No. 52,813, Collection Carnegie Museum, adult (male?); Jara- 

 quiel, Bolivar, Colombia, March 7, 1916; M. A. Carriker, Jr. 



Mecocerculus leucophrys notatus, subsp. nov. 



Similar to Mecocerculus leucophrys setophagoides (Bonaparte), but more 

 richly colored above, the upper parts much darker and more sooty olive; 

 and the wing-bars and external margins of the secondaries ochraceous buff 

 instead of buffy white. 



Type, No. 70,509, Collection Carnegie Museum, adult male; Leonera 

 (near Caldas), Colombia, September 6, 1918; M. A. Carriker, Jr. 



Platytriccus albogularis neglect us, subsp. nov. 



Similar in general to Platytriccus albogularis albogularis (Sclater), of 

 Ecuador and western Colombia, but decidedly duller and paler throughout; 

 the upper parts, sides of the pileum, etc., paler, more olivaceous; the under 

 parts with much less buffy and brownish suffusion. 



Type, No. 60,680, Collection Carnegie Museum, adult male; La Colorado, 

 Boyaca, Colombia, April 28, 1917; M. A. Carriker, Jr. 



Myiobius semiflavus, sp. nov. 



Above plain olive green, the pileum with a partially concealed median 

 patch of empire yellow, the rump and upper tail-coverts pale lemon yellow ; 

 wings dusky,the remiges margined externally with buffy citrine, most con- 



