GEN. 159-161 oF KEY. 
35la. BUTEO BOREALIS (Gm.) V., 
var. CALURUS (Cass.) Ridg. 
Western Red-tailed Buzzard. 
351b. BUTHO BOREALIS (Gm.) V., 
var. LUCASANUS Ridg. 
St. Lucas Buzzard. 
351c.* _ BUTEO BOREALIS (Gm.) V., 
var. KRIDERI. 
Eierider’s Buzzard. 
352. BUTHEO LINEATUS (Gm.) Jarp. 
Red-shouldered Buzzard. 
52a. BUTHO LINEATUS (Gm.) Jarp., 
var. ELEGANS (Cass.) Ridg. 
Western Red-shouldered Buzzard. 
353. BUTHO ZONOCERCUS Sct. 
Band-tailed Hawk. 
354. BUTHO SWAINSONTI Be. 
Swainson’s Buzzard. 
355. BUTEO PENNSYLVANICUS (Wus.) Bp. 
Broad-winged Buzzard. 
356. ARCHIBUTEO LAGOPUS (Brunn.) Gr., 
var. SANCTI-JOHANNIS (Gm.) Ridg. 
Rough-legged Buzzard. 
357. ARCHIBUTEO FERRUGINEUS (Licnut.) Gr. 
Ferrugineous Buzzard. 
358. ASTURINA PLAGIATA ScHLecet. 
Gray Hawk. 
359.t ONYCHOTES GRUBERI kine. 
Gruber’s Buzzard. 
71 

*351c. Not in Key; not published at date of going to press. 
+359. Questionably North American. 
