536 MOTACILtlD^. 



at the tip and rather more duslcy 

 along the inner web ; shaft very 

 pale; penultimate tail-feather smoky 

 brown, edged and tipped -with whi- 

 tish, both scarcely perceptible ; ,.,.^^,^^^^ 555_ 



upper surface uniform V ll'T -c / • r> iifiO 



g"^. Outer tail-feather rufescent, with '-' ' - ' ' 



blackish shaft and the greater part 

 of the inner web blackish ; pen- 

 idtimate feather with a wedge- 

 shaped mark of rufous white at 

 the tip. 

 «'. Upper plumage uniform or nearly 



so jerdoni, p. 662. 



¥. Upper plumage mottled with black- 

 ish centres to the feathers sordidits, p. 560. 



f'''. Light portion of outer tail-feather 

 white ; median and greater wing- 

 coverts tipped with pale fulvous or . ,. •^,;^^,,.^;- p_ 5(34.^ 

 j infuscatus, p. 567. 



h. With the hind claw exceeding the hind toe in 

 length or equal to it. 

 c'. 2nd, -"ird, and 4th primaries emarginate. 

 e". Rump uniform. 



g'". Chest streaked with black. 

 h^. Flanks streaked with black. 



c'. Light pattern on tail-feathers 

 white. 

 a^. Wing-coverts edged with sandy 

 rufous, but without conspi- 

 cuous white ; upper surface 

 sandy rufous, thickly mottled 

 with broad black centres to 

 the feathers. 

 a'. Penultimate tail-feather with 

 a wedge-shaped mark of 

 white on the inner web, 

 extending about one third 

 of the length of the feather, sfriolatus, p. 668. 

 b~. Penultimate tail-feather with 

 nearly as much white as the 

 outer one, consisting of a 

 long wedge-shaped mark 

 reaching for half the length 

 of the feather or more .... rtifidus, p. 674. 

 b^. Wing-coverts with dull white 

 margins, generally very con- 

 spicuous. 

 c'. Quills externally olive ; upper 

 surface olive, mottled with 

 black centres ; axlllaries 



tinged with olive-yellow . . pratensis ad., p. 582. 

 d''. No olive on quills or yellow 

 tinffe on axillaries. 



