Todd-Carriker: Birds of Santa Marta Region, Colombia. 161 



able South American series of this hawk differs materially in size from 

 northern birds, as the following table of comparative measurements 

 will show. Only specimens in comparatively unworn plumage have 

 been utilized. 



Falco fuscocwrulescens fuscocwrulescens: 



No. Sex. Locality. Wing. 



42022 1 ^ Mamatoco, Colombia 238 



52194 1 ■ ^ Turbaco, Colombia 230 



544881 ^ Aguachica, Colombia 241 



43958 1 (J Buenavista, Bolivia 240 



43960 1 jj Buenavista, Bolivia 248 



50615 1 cJ Buenavista, Bolivia 240 



42021 1 5 Mamatoco, Colombia 270 



525981 5 Lorica, Colombia...; 271 



515861 5 Buenavista, Bolivia 267 



52979 1 5 Miraflores, Argentina 263 



Falco fuscoccerulescens septentrionalis : 



20665 1 c? Cameron County, Texas 253 



214692 ^ Brownsville, Texas 258 



21471 2 Ji Brownsville, Texas 263 



214722 ^ Brownsville. Texas 263 



20041 2 jj Tampico, Mexico 257 



33074' c? Cameron County, Texas 258 



1114S5 * t^ Fort Hnachuca, Arizona (Type)... 267 



20666 1 (5) Brownsville, Texas 290 



20667 ^ 2 Cameron County, Texas 283 



21473 ^ 2 Brownsville, Texas 294 



214742 5 Brownsville, Texas 290 



The northern birds as a rule have the black area on the lower parts 

 more extensive, but in any case their markedly superior size would 

 seem to entitle them to formal recognition, and they have accordingly 

 been described under the above name by the writer in the Proceedings 

 of 'the Biological Society of Washington, XXIX, 1916, 98. 



A pair of these handsome falcons were taken near a small stream 



1 Collection Carnegie Museum. 



2 Collection Dr. Louis B. Bishop. 



3 Collection Dr. Jonathan Pwight. 



* Collection U. S. National Museum. 

 5 Exclusive in this case of the cere. 



