FALCONID.E — THE FALCONS. 133 



bands apparent ; tail distinctly tipped with ochraceous-white. Inner web of longest 

 primary with thirteen, more reddish, transverse spots. White of neck extending 

 obliquely upward and forward toward the eye, giving the black cheek-patch more prom- 

 inence. Markings beneath as in the male. Wing-formula the same. Wing, 14.50 ; tail, 

 7.00: tarsus, 1.95; middle toe, 2.10; culmen, .95. 



Juv. (^, 53,193, Truckee River, Nevada, July 24, 1867 ; R. Ridgway : first plumage). 

 Above plumbeous-black, tail more slaty. Every feather l>i-oadly bordered termi- 

 nally with dull cinnamon ; these crescentic bars becoming gradually broader posteriorly, 

 narrower and more obsolete on the head above. Tail distinctly tipped with pale cinna- 

 mon, the inner webs of feathers with obsolete transverse spots of the same, these touch- 

 ing neither the edge nor the shaft ; scarcely apparent indications of corresponding spots on 

 outer webs. Region round the eyc^ and broad " mustaclie " across the cheeks, pure black, 

 the latter more conspicuous than in the older stages, being cut off posteriorly by the 

 extension of the cream-color of the neck nearly to the eye. A broad stripe of pale 

 ochraceous running from above the ear-coverts back to the occiput, where the two of 

 opposite sides nearly meet. Lower parts purplish cream-color, or rosy ochraceous-white, 

 deepest posteriorly ; jugulum, breast, sides, flanks, and tibiae Avith longitudinal stripes of 

 plumbeous-black, these broadest on flanks and abdomen, nnd somewhat sagittate on the 

 tibiiS3 ; lower tail-coverts with distant transverse bars. Lining of the wing like the sides, 

 but the markings more transverse ; inner web of longest primary with nine transverse 

 purplish-ochre spots. Wing-formula, 2-1 3. Wing, 12.50; tail, 7.00. Length, 16.50; 

 expanse, 39.25. Weight, H lbs. Basal half of bill pale bluish-white, cere rather 

 darker ; terminal half (rather abruptly) slate-color, the tip deepening into black ; iris 

 very dark vivid vandyke-brown ; naked orbital space pale bluish-white, with a slight 

 gTeeni.«;h tint; tarsi and toes lemon-yellow, with a slight green cast; claws jet-black. 



Hab. Entire continent of America, and neighboring islands. 



Localities : Guatemala (Scl. Ibis I, 219) ; Veragua (Salv. P. Z. S. 1867, 158) ; Sta. Cruz 

 (Newton, Ibis, I, 63) ; Trinidad (Taylor, Ibis, 1864, 80) ; Bahamas (Bryant, Pr, Bost. 

 Soc. 1859, YII) ; Cuba (Cab. Journ. II, Ixxxiii) ; (G-undl. Repert. 1865, 225) ; Jamaica, 

 (GossK, B. Jam. IG ; March, Pr. Ac. N. S. 1863, 304, et Mus. S. L); Tierra del Fuego 

 (Sharpe, Ann. & Mag. N. H. ; " F. cassini, Sharpe "). 



Tlie young plumage above descriljed corresponds exactly with that of 

 young pcregrinus from Europe, a comparison of the specimen above described 

 with one of the same age from Germany (54,064, Schliiter Col.) showing no 

 differences that can be expressed. Many American specimens in this plu- 

 mage (as 19,397, Fort Simpson) show a wash of whitish over the forehead 

 and anterior part of the crown ; having before ns but the one specimen, we 

 cannot say whether or not this is ever seen in the European bird. Speci- 

 mens more advanced in season — perhaps in second year — are colored 

 as follows: The black above is more brownish, the feathers margined 

 with pale brown, — these margins broader, and approaching to white, on the 

 npper tail-coverts ; the tail shows the ochraceous bars only on inner webs. 

 The supraoral stripe of the youngest plumage is also quite apparent. 



A still younger one from the same locality (No. 37,397) has the upper 

 plumage similar to the last, the pale edges to the feathers, however, more 

 distinct ; tail with conspicuous spots. "White beneath clearer, and invading 

 the dusky of the head above as far back as the middle of the crown ; the 

 supraoral stripe is distinct, scarcely interrupted across the nape. 



