40 



BANGS AND PENARD 



TWO AMERICAN HAWKS [^yJi^vif ' 



MEASUREMENTS OF ADULTS (in millimeters) 



Acdpiter superciliostis superciliosus 



83.468< " Cayana " (Lafr. coll. 648) 



72,587> Ceara (trade skin) 



83,470' " Cayenne " (Lafr. coll. 650) 



83,469' " Cayenne " (Lafr. coll. 649) 



68,777* Upper Rocana, Para, Brazil 



442* Near Paramaribo, Surinam 



44,968' Essequibo River, British Guiana 



Acdpiter superdliosus exitiosus 



120,776' Carrillo, Costa Rica (type) 



13,282> Guapiles, Costa Rica 



28,099» El Hogar, Costa Rica 



44,977' Panama (Line of Panama R.R.) 



117,601' Barbacoas, western Colombia 



132,975* Puerto Valdiva, Cauca River, 



Colombia 



26,731« El Hogar, Costa Rica 



Wing 



Tail Tarsus Culmen 



In addition to the specimens listed above, we have seen two 

 immature birds, one from Panama, and the other from Santa 

 Marta, Colombia, both in the characteristic ferruginous plum- 

 age. Judging from the material examined, the range of the 

 new form extends from Costa Rica southward to, and including, 

 Colombia. 



Elanus leucurus majusculus subsp. nov. 



Type, M. C. Z., no. 100,915, adult cf; California: San Rafael, 1 De- 

 cember, 1883; C. A. Allen. 



Subspedfic characters. — Similar to Elanus leucurus leucurus (Vieillot) 

 of Paraguay, but larger; wing and taU longer, the tail-feathers relatively 

 wider. Coloration about the same. 



' Collection of the Museum of Comparative Zoology. 



i The inclusion of a sex mark in parenthesis indicates that the Bex has been determined 

 by measurement of the skin, not by dissection. 



• Collection of the Carnegie Museum. 



• Collection of T. E. Penard. 



' Collection of the American Museum of Natural History. 



