78 



BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



plumbeous broadly edged on the inner web, and very narrowly tipped 

 with white, chiefly whitish on the under side; secondaries blackish 

 plumbeous, broadly tipped with white and broadly edged on the 

 inner web with white, this white increasing on the inner remiges until 

 the whole feather is white save for a large subterminal plumbeous 

 blotch, the white extending to both webs; the dark blotch frequently 

 with a touch of russet to vinaceous brown; rectrices dark slate gray 



Figure 6. — Gampsonyx swainsonii. 



very narrowly tipped (in fresh plumage) with white; all but the median 

 pair with the inner webs edged broadly with white; lores, cheeks, and 

 auriculars antimony yellow to pale honey yellow; chin, throat, sides 

 of neck, breast, adbomen, and under tail coverts white; a dark blackish 

 plumbeous gorget on either side of the breast; central and lower 

 abdomen washed with pale buff to maize yellow; sides and flanks 

 and under wing coverts mixed with pale mikado brown to pale russet ; 

 thighs russet to buff mixed with russet; iris chestnut; cere and bill 

 blackish; tarsi and toes chi-ome yellow; claws black. 



