FALCON IV JH — B UTEONIN^ : B UZZABBS. 



647 



more or less tinged and varied, iu different speeiujens, with liglit chestnut. In some males, tliis 

 chestnut is diminished to traces, chieiiy iu iianlc-bars and arrow-heads, and the white throat is 

 imuuiculato ; iu others, the thrcjat sliows blaclush pencilling, and the rest of the under parts are 

 so much marked with chestnut, chieiiy in cross-bars, that this color predominates over the 

 white, and appears iu direct continuation of the pectoral area itself. Some feathers of this area 

 are commonly darli brown. Length 19.00-20.00 ; extent about 49.00; wing 15.00 or a little 

 more; tail 8.50 ; tarsus 2.50; middle toe witliout claw 1.50. Adult 9 : Much darker under- 

 neath than the male ; throat pure white, but other under parts probably never wliiteuing 

 decidc^dly. Pectoral area from riidi dark chestnut ov maliogany-color, mixed witli still darker 



Fig. 381. — Biti(^o vuhjaris of Europe, 

 B. swainsoni. (From Brebm. ) 



nt ilistingiiisliable in the cut from one of the plumages or 



feathers, to brownish-black ; and other under parts heavily marked with chestnut, chiefly in 

 cr(]SS-bars alternating with whitish, but on the flanks, and sometimes across the helly, these 

 markings quite blackish. The general t(jne of the under parts may be quite as dark as the 

 pectoral area of the male, but it lacks uniformity, and the increased depth of color of the 

 pectoral area in this sex suffices to preserve the strong contrast already mentioned. Length 

 20.00-22.00; extent 50.00-54.00 : wing 15.00-10.50 ; tail9.00. Changes of plumage with age 

 aflfect chiefly the under parts ; the back, wings, and tail are more nearly alilve at all times. 

 Young (J 9 • Entire upper parts darl? brown, everywliere varied with tawny edgings of the 

 individual feathers. The younger the bird, the more marked is the variegation ; it corresponds 

 in tints closely with the color of the under parts, beinc palest in very young examples. Under 

 parts, including lining of wings, nearly uniform fawn-color (pale dull yellowish-brown). 



