BUTEO. 231 



dusky, either color predominating (except 

 the last) according to the individual, crossed 

 near end by a more or less distinct subter- 

 minal band, and tipped with whitish ; upper 

 parts chiefly (sometimes entirely) dark sooty 

 brown or blackish (varying to deep black) ; 

 lower parts varying from entirely deep sooty 

 brown or black to pure white, but, if the lat- 

 ter, always more or less streaked and spotted, 

 especially across belly and on sides of breast, 

 with dusky. Young : Tail banded with gray- 

 ish brown and dusky, the two colors of about 

 equal extent; otherwise, much like adult. 

 Male: Length 20.00-21.00, wing 14.25-16.10, 

 tail 8.80-10.00, culmen .98-1.00, tarsus 2.75- 

 3.50, middle toe 1.50-1.70. Female: Length 

 22.00-23.50, wing 15.75-16.50, tail 9.10-10.00, 

 culmen .98-1.10, tarsus 2.85-3.50, middle toe 

 1.60-1.80. Hab. Gulf States and lower Missis- 

 sippi Valley, north, casually, to Kansas, Iowa, 

 Illinois, and Pennsylvania, east to Georgia. 

 338. B. harlani (Aud.). Harlan's Hawk. 

 ?i,'. Feathers of head and neck more or less distinctly 

 edo-ed with ochraceous or rusty. Adult: Tail 

 rufous, paler at tip, usually crossed near end 

 by a narrow band or bar of blackish (rarely 

 with more or less distinct narrow bands, or 

 indications of bands, anterior to the subter- 

 minal band) ; upper parts chiefly or entirely 

 dusky grayish brown, sometimes irregularly 

 broken by admixture of whitish and brownish 

 gray ; lower parts varying from entirely pure 

 white (usually with dusky streaks across 

 belly) to w-holly sooty blackish, with or with- 

 out rusty on breast. Young : Tail grayish 

 brown, varying to dull ochraceous, crossed by 

 nine or ten well-defined narrow bands of 

 blackish; otherwise much like adult, but 

 usually with much less of tawny or ochra- 

 ceous. Male : Length about 19.00-22.50, ex- 

 tent of wings 49.00-53.00, wing 13.50-16.50, 

 tail 8.50-10.00, culmen .95-1.08, tarsus 2.40- 

 3.20, middle toe 1.60-1.70, weight 2-3 pounds. 

 Female: Length 23.00-25.00, extent 54.00- 

 57.50, wing 15.25-17.75, tail 9.50-10.50, cul- 



