Henningek-Jonf.s— On Fxlcones of Xorth America. 87 



aging 41.31 mm. ; creamy white, spotted with recUHsh, cin- 

 namon, or chocolate, with a -few heavier spots of the same 

 colors. The eggs are laid in March to June, depending upon 

 the latitude. Incubation lasts about 22 days. 



FALCO yESALON {Tunstall). 

 A^Ierlin. 

 Geographical Distribution. 

 Europe, Asia, Africa. Accidejital at Cape Farewell, Green 

 land (May 3, 1875). 



Measurements. 



Male: Length 27.96, wing 19.62, tail 13.21, culmen 1.19, 

 tarsus 3 58, middle toe 2.92. 



Female: Length 33.(55, wing 22.-13, tail 15.67, culmen 1.37, 

 tarsus 3.71, middle toe 3.13. 



Diagnostic Marks. 

 Above bluish-gray, beneath rusty with brownish stripe.s : 

 black subtemiinal bar of closed tail. Flight. 



Plumage. 



Adult male : L^pper parts bluish-gray with fine black shaft 

 streaks, hind neck spotted with whitish and bufify, tail with 6 

 or 7 concealed black bands, tipped with white ; cheeks with 

 a distinct 'moustache,.' Below light rusty streaked with 

 brownish. 



Adult female : Upper parts brownish, top of head with 

 black streaks ; tail with about eight narrow pale bands ; lower 

 parts more whitish or buffy with brownish streaks. 



Flight and Habits. 

 A bold, swift and graceful hawk; hunts in pairs; is fond 

 of soaring high in the air at times. 



Food. 

 Mostly small birds, occasionally locusts and beetles. 



Voice. 

 Ke ke ke ke, ki-ha. ki-ha. 



