CROWS, JAYS, MAGPIES, ETC. 269 



Distribution. Colorado Desert, on both sides of the Colorado River 

 from the great bend south to Gulf of California. 



474k. O. a. hoyti Bishop. HOYT HOKNED LARK. 



Like arcticola, but upper parts more rufescent, throat generally dis- 

 tinctly yellowish, and lores white. Male : wing 4.09-4.54, tail 2.57-2.95. 



Distribution. Breeds in British America ; migrates to Nevada, Utah, 

 Kansas, and Michigan ; casually to Ohio and New York. 



4741. O. a. Occident alls (McCall). MONTEZUMA HORNED LARK. 



Like leucolcema, but upper parts with a slight reddish tinge, leucolcema 

 being grayer. Male: wing 4.07-4.15, tail 2.63-2.95. 



Distribution. In summer, central New Mexico, west to central Arizona ; 

 in winter, south to Sonora and Chihuahua, Mexico, and southeast to Texas. 



474m. O. a. insularis Towns. ISLAND HORNED LARK. 



Like strigata, but darker, and less yellowish below. Male : wing 3.74- 

 3.96, tail 2.36-2.67. 



Distribution. The Santa Barbara Islands, California. 



FAMILY CORVID^S : CROWS, JAYS, MAGPIES, ETC. 



KEY TO GENERA. 



1. Wing long and pointed. 



2. Plumage black Corvus, p. 279. 



2'. Plumage mainly gray or blue. 



3. Plumage blue Cyaiiocephalus, p. 284. 



3'. Plumage gray, black, and white Nucifraga, p. 282. 



1'. Wing short and rounded. 



2. Plumage black and white Pica, p. 269. 



2'. Plumage not black. 



3. Head crested Cyanocitta, p. 271. 



3'. Head not crested. 



4. Plumage mainly gray or blue. 



5. Plumage gray Perisoreus, p. 277. 



5'. Plumage blue Aphelocoma, p. 274. 



4'. Plumage mainly green and black . . . Xanthoura, p. 277. 



GENUS PICA. 



General Characters. Tail much longer than wing, graduated for half 

 its length or more, the feathers becoming narrower towards tips ; wing 

 short, rounded, primaries exceeding secondaries by much less than length of 

 tarsus ; nostrils covered by bristles ; orbits partly naked ; feet stout ; wings 

 and tail metallic. 



KEY TO SPECIES. 



1. Bill and naked skin around eyes black. . . . hudsoiiica, p. 270. 

 1'. Bill and naked skin around eyes yellow .... iiuttalli, p. 271. 



