JAN., 1909. BIRDS OF ILLINOIS AND WISCONSIN CORY. 147 



GROUP 3. Wing, 9.50 to 13 inches long. 

 SECTION 1. The following species have the second primary longest : 



Upper parts, ash gray; head, nearly white; shoulder, black; iris, 

 red ; upper surface of inner web of first primary, without bars ; breast 

 and belly, white. Elanus leucurus. 



White-tailed Kite. 

 See No. 152. 



Upper surface of inner web of first primary, barred with white; 

 breast and belly, streaked. Falco mexicanus. 



Prairie Falcon. 

 See No. 168. 



Upper surface of inner web of first primary, barred with pale 

 rufous brown ; breast and belly, streaked. Falco peregrinus anatum. 



Duck Hawk. Peregrine Falcon. 

 See No. 169. 



SECTION 2. The following species have the third primary longest: 



Belly, slaty gray (adult), or buffy streaked more or less with pale 

 brown (immature ) ; upper tail coverts, not white ; no white band on 

 tail. Ictinia mississippiensis . 



Mississippi Kite. 

 See No. 153. 



Third and fourth primaries, about equal length; upper plumage, 

 slaty gray ; tail, black, banded with white (adult ) ; wing, always 

 less than 12 inches long. Asturina plagiata. 



Mexican Goshawk. 

 See No. 162. 



Third and fourth primaries, about equal length; upper plumage, 

 dark brown; tail, grayish brown, banded with black (immature); 

 wing, always less than 12 inches long. Asturina plagiata. 



Mexican Goshawk. 

 See No. 162.^ 



SECTION 3. The following species have the fourth primary longest : 



Upper tail coverts, white; wing, less than 12 inches long; tail, 

 less than 8.25; a Mexican species; accidental in Illinois (only one 

 record). Asturina plagiata. 



Mexican Goshawk. 

 See No. 162. 



