HENNiNr,p:R-JoNF.s — On Falcones of North America. 81 



Nest. 



On ledge of clilts, on the sides of ravines, and similar 

 places, also in the tops of tall trees, usually pines, composed 

 of sticks and small branches, lined with moss, hay, hair, 

 feathers, etc. 



Eg-g-s. 



Three or four, laid from ^lay 10 to the middle of June. 

 Texture rough. Ovate. White or creamy ground color 

 which is scarcely distinguishable beneath the spots and blotch- 

 es of various shades of reddish brown, clay and fawn color, 

 the markings are small. Size 59.5 x 1:5 mm (gyrfako), 57.4 

 X 15.1 mm. (obsolctiis) (Bendire). 



FALCO PEREGRINUS (Titiist). 

 Peregrine Falcon. 



Three forms are grouped under this heading, according to 

 the latest ruling of the committee on nomenclature. These 

 are the Peregrine Falcon, with scientific name as above, F. p. 

 aiiatum (Bonap.), Duck Hawk, and F. p. pcalci Ridgway 

 Peak's Falcon. 



Peregrine Falcon : Eastern Hemisphere, Greenland. 



Duck Hawk: North and South American south to Chili 

 (as the name pcrcgriinis is intended to indicate, a great wan- 

 derer) ; breeding locally throughout the United States, Labra- 

 dor, Hudson's Bay, and British Columbia. 



Peak's Falcon : Pacific Coast from Oregon and Washing- 

 ton to the Aleutian and Commander Islands, this also form- 

 ing the breeding range. 



Measurements. 



Peregrine Falcon and Duck Hawk: Male, length 42.73, 

 wing 31.07, tail 17.46, culmen 1.96, tarsus 4.12, middle toe 

 4.92. 



Female, length 48.79, wing 36.27, tail 20.85, culmen 2.41, 

 tarsus 5.31, middle toe 5.41. 



