BDTEO. 237 



lower parts white, somotiincs streaked with brownish, tho 

 sides of chest without brown or rusty patch. JIab. Tropical 

 America in e;eneral (except West Indies), north to eastern 

 Mexico and Flori(hi. 



344. B. brachyurus Yieill. Short-tailed Hawk. 

 d'. Middle toe shorter than naked portion of tarsus in front. (Sub- 

 genus Butco, part.) 



Only three outer quills with inner webs eniarginated. Adult : 

 Tail blackish, crossed by 2-4 broad bands of light brownish 

 gray or brownish white, and narrowly tipped with whitish ; 

 upper parts nearly uniform dusky brownish, darker on 

 back ; beneath brownish (varying to dull rufous or rusty) 

 anterior!)', usually more or less broken by white transverse 

 spotting ; posterior lower parts white, barred or transverse!}- 

 spotted with dull rufous. Young: Tail grayish brown, 

 crossed by 5-7 narrow bands of dusky, and tipped with 

 whitish ; sides of head and entire lower parts dull white, 

 or buffj', marked longitudinally with blackish or duskj-, on 

 breast, sides, etc., the cheeks with a rather distinct " mus- 

 •'tache" of dusky streaks. Male: Length about 13.25-15.00, 

 wing 9.85-10.70, tail 6.50-7.00, culmcn .70, tarsus 2.15-2.80, 

 middle toe 1.20-1.38. Female: Length about 16.00-18.00, 

 wing 11.00-11.40, tail 7.00-8.00, culmen .70-.80, tarsus 

 2.20-2.70. A^est in trees (often a deserted crow's nest). 

 Eggs 2-4, 1.93 X 1-56, buffy whitish, variously spotted and 

 blotched with brown. Jlah. Eastern North America, north 

 to Xew Brunswick and the Saskatchewan, west to edge 

 of Great Plains, south (in winter only?) through Middle 

 America and West Indies to northern South America. 



343. B. latissimus (Wils.) Broad-winged Hawk, 

 a'. Tail less than half as long as wing; tarsus about half as long as tail ; primaries 

 exceeding secondaries by nearly the length of tho tail. (Subgenus Tachy- 

 triorchis Kaup.') 



Only three outer quills with inner webs distinctlj' cmarginated. Adult 

 male: Above (except rump) plain bluish gray (varying to slaty or even 

 dusky), the anterior lesser wing-coverts rufous, the longer scapulars 

 much tinged with tho same ; tail white, crossed near end by a broad 

 band of black, anterior to which arc numerous narrow bars or lines of 

 slate-gra}- or pIuml)eous, or dusky ; rump and lower parts pure white, 

 the throat sometimes dusky or graj-ish ; flanks, rump, and under wing- 

 coverts usually faintly ban-ed with ashy, duskj-, or rufous. Adult female: 

 Similar to adult male, but rufous patch on lesser wing-coverta more 



• Tach^lriorchU Kacp, Class. Saug. u. Vog. 1844, 123. Type, Falco pterocUa Te¥U., = /'. albicaudalui 



ViEILL. 



