14 Bulletin American Museum of Natural History [Vol. XLVIII 



Buteo borealis calurus Cassin 

 Western Red-taii, 

 Miraflores, April 25, one specimen. 



Falco sparverius phalsena (Lesson) 

 Desert Sparrow Hawk 

 West San Benito Island, March 9 and San Jose del Cabo, March 

 26, three specimens. 



Falco sparverius peninsularis Mearns 



San Lucas Sparrow Hawk 

 Cape San Lucas, March 24 and Miraflores, May 2 and 18, six 

 specimens. 



Polyborus cheriway (Jacquin) 

 Audubon's Caracora 

 Santa Margarita Island, March 19 and Magdalena Bay, March 21, 

 two specimens. 



Pandion haliaetus carolinensis (Gmelin) 



OSPREY 



Observed at many places. Nests are conspicuous on the uninhabited 

 islands such as Cedros and the San Benitos. Young ospreys were 

 brought on board at Agua Verde Bay. 



Cerros Island, March 10, one specimen. 



Asio flammeus (Pontoppidan) 

 Short-eared Owe 

 Cape San Lucas, March 23, one specimen. 



Otus xantusi Brewster 



Xantus's Screech Owl 

 Miraflores, April 25 and May 18, twelve specimens. 



Bubo virginianus elachistus Brewster 

 Dwarf Horned Owl 

 Angel Guardia Island, April 11, Espiritu Santo Island, April 18, 

 Miraflores, April 30 and May 12, and La Palma, April 20, eight speci- 

 mens. 



