254 NORTH AMERICAN BIRDS. 



tail 10.00-11.00, culmen 1.20-1.41, tarsus 3.70-4.70. Ilab. South America, 

 excejit northern portions. p. tharus (Mol.). Caracara.^ 



U^. Scapulars, sides, belly, and middle wing-coverts jDlain black in adult, plain 

 dull brownish in young; tail-coverts plain white. Adult: Upper half 

 of head, scapulars, wings, lower back, rump, belly, sides, flanks, and anal 

 region plain dull black, or brownish black ; upper back and breast black, 

 barred with white ; lower portion of head, neck (all round), chest, and 

 tail-coverts soiled white, the chest transversely spotted with black ; basal 

 two-thirds (or more) of tail white, crossed by about 13-14 narrow bars 

 of dusky, these growing less distinct basally ; terminal zone of tail uni- 

 form black. Young : Black of adult replaced by dull brownish, darkest 

 on top of head ; white and dusky areas gradually blended, those portions 

 which are barred in the adult being striped with the two colors; tail as 

 in adult. Length 20.50-25.00, wing 14.60-16.50, tail 8.80-10.00, culmen 

 1.20-1.48, tarsus 3.20-3.75. Nest on trees, bushes, or cliffs. Eggs 2-4, 

 2.30x1-74; ground-color cinnamon, pale umber, brownish white, or 

 walnut-brown, variously marked (usually blotched or stained) with 

 deeper brown (burnt-umber, chestnut, or claret-brown). Hah. Middle 

 America and northei-n South America, south to Guiana and Ecuador, 

 north to southern border of United States (Florida to Lower California). 

 362. P. cheriway (J acq.). Audubon's Caracara. 

 a^. Eump and upper tail-coverts dull brownish buff, or light isabella-color, broadly 

 barred with dull brown ; tail brownish buff, or pale isabella-color, with broad 

 bars of grayish brown bordered by narrower zigzag bars or lines of dusky, 

 the terminal dark band less than 2.00 wide. 



Adult: Upper half of head, lesser wing-coverts, secondaries, primary cov- 

 erts, terminal portion of primaries, under side of wing (including axillars), 

 and terminal zone of tail, plain blackish brown; ear-coverts, cheeks, and 

 throat plain dirt}" whitish or pale brownish buffy ; rest of plumage 

 barred with dusky brownish and dull brownish buff or dirty brownish 

 white. Young : Quills, tail, tail-coverts, head, and lesser wing-coverts 

 much as in adult ; rest of plumage more or less distinctly striped with 

 dull brown and dirty brownish white or dull buffy, the former prevail- 

 ing, and sometimes nearly uniform, on upper parts. Downy young: 

 Light brownish buff, with a brown patch covering arm-wing and scapu- 

 lar region, and another covering top of head. Wing 15.00-16.40, tail 

 10.50-11.65, culmen 1.25-1.35, tarsus 3.50-3.75. Hah. Guadalupe Island, 

 Lower California 303. P. lutosus Eidgw. Guadalupe Caracara. 



Genus PANDION Savigny. (Page 224, pi. LXX., fig. 3.) 



Species. 

 Adidt male : Above plain dusky grayish brown, the tail more grayish, narrowly 

 tipped with white, and crossed by about six or seven narrow bands of dusky ; head, 



1 Falco tharus MoL., Sp. Chil. 1782, 264, 343. Polyhorua tharua Strickl., Orn. Syn. 1855, 19. 



