46 



BANGS AND PENARD — TWO AMERICAN HAWKS [^v^i^vii 



MEASUREMENTS OP ADULTS (in millimeters) 



Acdpiter superciliosus superciliosus 



83,468> " Cayana " (Lafr. coll. 648) 



72,5871 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 



Accipiter superciliosus exitiosus 



120,7761 Carrillo, Costa Rica (type) 



13,2823 Guapiles, Costa Rica 



28,099' El Hogar, Costa Rica 



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



117,601' Barbacoas, western Colombia 



132,9755 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 &; CaUfornia: San Rafael, 1 De- 

 cember, 1883; C. A. Allen. 



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

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

 wider. Coloration about the same. 



1 Collection of the Museum of Comparative Zoology. 



2 The inclusion of a sex mark in parenthesis indicates that the sex has been determioed 

 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. 



