FAM. XXIX. HAWKS, EAGLES, ETC. 195 



E. Nostril circular and with a conspicuous central bony tubercle ; 2 

 upper mandible with a strong tooth and notch back of the hooked 

 tip. (J.) 

 E. Nostril oval and the upper mandible without more than one lobe or 

 tooth, and that not a strong one.^ (F.) 

 F. Tail about | as long as the wing. (I.) 

 F. Tail not over j as long as the wing. (G.) 



G. Outer web of the primaries with white, buffy, or reddish spots ; four 



outer primaries notched on the inner web ;* wing, 7. ',-10 long 



11. Red-shouldered Hawk. 



6. Under parts white, very slightly if at all streaked ; upper parts 



nearly black ; Florida 16. Short-tailed Hawk. 



G. Not as above. (H.) 

 H. Four outer primaries notched on the inner web ; ■• tail generally quite 



red 10. Red-tailed Hawk. 



H. Three outer primaries notched ; ^ wing, 14-18 long 



14. Swainson's Hawk. 



H. Three outer primaries notched ; wing, 9i-12 long 



15. Broad-winged Hawk. 



I. Wing under 9 long ; tail square ^ 6. Sharp-skinned Hawk. 



I. Wing, 8|-11 long ; tail rounded^ 7. Cooper's Hawk. 



I. Wing, lli-14J long . . 8. American Goshawk. 



J. Wing, 11-17 long; only one primary notched on the inner web.^ (N.) 



J. Wing, 9^-11 1 long ; two primaries notched ; southern Texas 



30. Alpomado Falcon. 



J. Wing, 5-9^ long ; two primaries notched. (K.) 



K. Back or belly with more or less of bright brownish-red 



31. American Sparrow Hawk or Cuban Sparrow Hawk. 



K. Back bluish slate color, or blackish and without bright rufous. . . . 



28. Pigeon Hawk or 2t). Richardson's Merlin. 



L. Tail gray, barred with blackish ; wing, 13-16 long ; common 



5. Marsh Harrier. 



L. Tail mainly white but much barred ; wing, 14-18 long; Texas 



13. Sennett's White-tailed Hawk. 



L. Tail zoned black and white ; extreme southwestern hawk with wing 



9|-12 long 18. Mexican Goshawk. 



M. Base and tip of tail white ; shoulders and tibia chestnut ; wing, 



12-15 long ; western 9. Harris's Hawk. 



M. Three white bands across the tail at base, tip, and center ; Texas 



12. Zone-tailed Hawk or 17. Mexican Black Hawk. 



M. Wing, 10-13 long ; Florida ; black phase of. . 16. Short-tailed Hawk. 



