THE GYR FALCON— DAWSON'S FALCON. . 25 



corrections made by myself, the same specimens being before me 

 from which the description was originally taken. 



Sp. Char. Bill stout, strongly toothed in upper mandible, the 

 tooth corresponding with a notch in the lower one, of a bluish color, 

 terminating in a black tip, which is the color of the cere and irides. 

 Tarsi feathered half way to the toes, of a dark greenish blue. 

 Toes long, moderately strong, claws black and much curved. 

 Eyelids dirty white, this color forming a complete circle round 

 the eyes. 



Dorsal aspect. The prevailing color is a dark slate color, 

 tipped with cinereous on the back of the neck, interscapulars and 

 secondaries, and with rufous on the back, the upper tail coverts 

 tipped with dirty rufous white (in one of the specimens). Many 

 of the secondaries have a rufous white rounded spot near the end 

 of their outer vanes. Tint of the upper part of the tail of a 

 brownish slate color, with about ii to 14 bars of light rufous 

 terminating in rufous white near the tip, the tail tipped with the 

 same color. The tail consists of about 11 feathers (12), the ex- 

 tremities of which are all rounded. 



Ventral aspect. Chin and upper part of throat whitish, each 

 feather having a narrow streak of slate color along its shaft. The 

 prevailing tint, like that of the back, is slate color, (darker tint), 

 but differing from the back in that each feather has the outer vane 

 white, with an irregular long white spot on the inner vane, leaving 

 the central position of the prevailing color. Femorals as long as 

 the tarsals, the white on the feathers here assuming almost a 

 banded or barred appearance, which in the female is distinctly so. 

 Under tail coverts of alternate rufous white and slate colored bars. 

 The under surface of the tail exhibits a rufous tint, while the bars 

 are more distinctly seen. 



2nd primary longest ; ist shorter than the 3rd, but longer than 

 the 4th : inner vanes of the primaries barred with white. 



D 



