I'ALCONID.E — THE FALCO^fS. 305 



oqunl to (iftli; .•Jccoiul iutcrini'diate botweoii fifth and sixth; first equal to uighlh. Winu', 

 l().oO; tail, 'J.OO; tarsus, •ISA); middle lou, l.liO; hill, 1.311 aiul .1)0. 



Adult J'emale ("28. lati, rhiliid('l|ihia, I'a. ; .1. Kridui). Guucrally similar to tlu- male. 

 On liead and iiaiic, however, tiie yellowish-white inedominates, the eeiitral hlaek Ijeiiij,' 

 niiieii re(hieed; on the other hand, there is less white on the upper parts, the dull eine- 

 reous-drah heiiii:' I'.iiirh more evenly sjiread ; darker markings less conspieuoiis. Tail 

 while only at tlu' base, the reiiiaiiiing portion lieiii^' pale einereous-dralp erii,-.sed with 

 lour or live dislinet, very regular bands of l)la(k, the ti[) being very broadly ashy. 

 Flanks with grouiid-eolor light umber-drab, and marked with transvor.se bands of black. 

 Lower surl'aeo generally as in the male; tail-coverts with two or three blaekish spots, 

 ap|iarently out of plaee. Fourth quill longest; (ifth mueli shorter than third; seeond 

 intermediate between lifth and sixth; first intermediate between .seventh and eighth. 

 Wing, 17.00; tail, !).00; tarsus, 2.40 ; middle toe, 1.30; bill, 1.30 and .85. 



Youny (25,934, United States). Upper surface generally light umber, becoming lighter 

 on scapulars and middle wing-eoverts, liut showing nowhere any trace of spots or bamls; 

 wings, .scapulars, and back with blackish shall-streaks; priunu'ies approaching lilack toward 

 ends, becoming white basally ; upper tail-coverts white, with a Im.stato stripe of brown 

 along shaft ; tail, basal half white, terminal half ])lain drab, becoming darker terminally, 

 the tip narrowly white. Head, neck, and lower phimage in general, white stained with 

 ochraecous, this deepest on til)ia! and tarsi ; head and neek streaked with dark Iji'own, car- 

 coverts .almost immaculate; lircast with oblong spots of clear l)rown; Hanks, abdomen, 

 and anal region continuous uniform rich purplish vandykc-brown, forming conspicuous 

 transverse belt ; tibia^ and tarsi scarcely varied, the few uiarkings longitudinal ; lower tail- 

 coverts immaeulato. Under side of wing much as in adult; black area, however, more 

 extended ; lining much tinged with rufous, and with longitudinal streaks of dark brown. 



6. Mclanintic rcmUtion. 



Adult male (28,153, Philadelphia; .1. Krider). Oeneral plumage bl.ickish-brown, the 

 head streaked by whitish edges of the feathers; wing-i'overts, secondaries, primaries, 

 and tiliial plumes paler terininally ; tarsi mottled with whitish; iqjpcr and lower tail- 

 coverts tipped obscurely with white. Tail narrowly tipped with dull white, and with 

 about five very obsolete pale ashy bands. Lining of wing black, spotted with white near 

 edge; whole under surface of the primaries pure white anterior to their emargination, 

 beyond which they are black. Third and fourth quills equal and longest; second inter- 

 mediate between fifth and sixth; first sho"ter than .seventh. Wing, 1(5.00; tail, 8.85; 

 tarsas, 2.45; middle toe, 1.25. 



Adult female (12,008, riiiladelphia; C. Drcxler). Continuous pure carbonaceous black; 

 forehead white; occiput same beneath surface. Tail paler at tiji, and crossed with tour 

 ill-defined though continuous bands rf ashy white, the la.st of which is distant over two 

 and a half inches from the tip; lov. .r tail-coverts with a few white spots. AVholt> lining 

 of wing glossy coal black ; under smface of primaries, anterior to their emargination, white 

 motth'd with .a.<liy. Fourth and fifth quills ecpial and longest; third only a little shorter; 

 second a little longer than .sixth; first intermediate between seventh .and eighth. Wing, 

 1().50; tail. 9.00; tarsu.s 2.50 ; middle toe. 1.20. 



YiiuiKj. Similar, but the tail dusky, growing whiti.sh toward the base, and without any 

 bais. 



Hah. Whole of North America north of Mexico, but breeding northward of the United 

 States. 



Localities: Western Arizona (Couks, Pr. A. N. S., 18G0, 48). 



LIST OF SPKCIMKSS KXAMINF.l). 



National Museum, 44; Phil.idclphia Academy, 17; Boston Society, 1; Museum Com- 

 voL. III. 39 



