FALCONID.E DIUENAL RAPTORES. 463 



Adult female (No. 34,002, Mazatlan, June: Colonel Grayson). Cinereous, above darker, 

 the fasciag of the wings hardly observable; front and throat scarcely whitish; rump 

 almost pure black; second tail-band much broken and restricted. Ashy prevailing on 

 thejugulum, ashy bars beneath rather broader. Wings, 11.00; tail, 7.60; tarsus. 2.80; 

 middle toe, 1.70. 



Young male (No. 35,060, Rio de Coahuyana, W. Mexico, October: J. Xantus). Above, 

 from bill to upper tail-coverts, dark bistre-brown, almost black; feathers' of the head and 

 neck edged laterally with pinkish ochraceous, or sulphuret-of -manganese color; scapu- 

 lars with nearly whole outer webs of this color, they being blackish only along edges and 

 at ends; middle wing-coverts spotted with the same. Secondaries and primaries faintly 

 tipped with whitish; secondaries with indications of darker bands, and outer webs of 

 primaries with still more obscure ones; upper tail-coverts white, with sagittate specks 

 of black, one or two on each. Tail umber-brown ^considerably lighter than the wings), 

 tipped with pinkish ash (this passing terminally into dull white) and crossed with six or 

 seven bands of black (these becoming gradually, but very considerably, narrower toward 

 the base). Beneath white, with vinaceous tinge (this deepest laterally) ; breast, abdomen, 

 and sides with large tear-shaped or cuneate spots of black; tibiae with numerous trans- 

 verse bars of the same. 



Young female. Similar to last, but the brown lighter, and more approaching umber. 



In both sexes the iris is brown, bill and claws black, or bluish 

 black; cere, rictus, legs, and feet yellow. 



Four other adults, with sex not indicated on labels, measure as 

 follows : 



Wing, 10.00-11.70; tail, 6.80-8.00; culmen, .90-.95, tarsus, 2.65-2.80; middle toe, 1.50-1.65. 



A specimen of this tropical species was seen by the writer on 

 Fox Prairie, in Eichland Co., on the 19th of August, 1871.* It 

 several times came so near that its peculiar markings could be seen 

 with perfect distinctness, and the writer having previously handled 

 many stuffed specimens there cannot be the slightest doubt as to 

 the correctness of its identification. 



*See American Naturalist, July, 1872, p. 430, and April, 1873, p. 201* 



