bangs and penard: surinam birds. 35 



Falconidae. 



22. Ibycter americanus (Boddaert). 



One adult 9 , " Saramaccapolder, about three hours walk from the 

 Tweede Rijweg," July. 



23. MiLVAGO CHIMACHIMA CHIMACHIMA (VieiUot). 



One immature cf, Vicinity of Paramaribo, July. 

 The northern form, ranging from Panama to at least Colombia, 

 differs decidedly from the southern bird, and we name it 



23a. MiLVAGO CHIMACHIMA CORDATA, subsp. nOV. 



Type.— M. C. Z. 40,373. Adult 9 . San Miguel Island, Bay of 

 Panama. 27 February, 1904. W. W. Brown, Jr. 



Characters. — In general like M. c. chimachima (Vieill.), but back 

 much browner, not so blackish; under parts darker, varying from 

 light buff to warm-buff (cartridge-buff in true M. c. chimachima); 

 head darker; upper tail-coverts light buff (whitish in true M. c. 

 chimachima); base of primaries and under wing-coverts nearly con- 

 color — ochraceous-buff (in true M. c'. chimachima the base of the 

 primaries is whitish, the under wing-coverts about warm-buff). 



Measurements. — Type, adult 9 ; wing, 292; tail, 196; tarsus, 50; 

 culmen from cere, 22. Topotype, M. C. Z. 40,369, adult cf ; wing, 

 275; tail, 183; tarsus, 50; culmen from cere, 23. 



24. Geranospizias caerulescens (Vieillot). 

 Two specimens, cf and 9 , Vicinity of Paramaribo, February. 



25. Accipiter superciliosus (Linne). 

 One adult. Vicinity of Paramaribo, August. 



