AVES CHARADRIID^ 281 



Color. — Adult male (cited). General color above, ashy; grayer on the 

 head, oliv^e on the mantle and wings, shaded with an iridescent metallic 

 gloss, reflecting bronze, green and peacock shades. Lower back grey, 

 rump and tail white, the latter with a broad black subterminal bar. 



Lower parts black on chest, breast, neck, throat and chin ; white on 

 lower breast and abdomen. 



Head : With a long, slender, recurved occipital crest. Forehead 

 black, back as far as above the fore part of the eyes, including most of 

 the loral region. The black defined by a white band crossing the an- 

 terior part of the crown and passing down in front of the eyes along 

 the sides of throat and neck. This white is in sharp definition where it 

 touches the black and shades off on its approach to the grey areas into that 

 color. Rest of head, including the crown, occiput, auricular region and 

 sides of face, clear ashy grey. Eyelids with darker grey shading. 



Neck : Ashy grey above and on the sides, black below. The black 

 divided from the ashy by a white streak or band as described on the head. 



Back : Chiefly ashy grey. The mantle and parts of the scapular 

 region with a strong olive tinge and shaded with iridescent metallic 

 green bronze. Lower back and rump clear ashy gray. Upper tail 

 coverts pure white. 



Wings : With a long sharp spur at the carpal joint. Yellow in color. 



The lesser coverts purplish blue black, glossed with bronzy metallic 



green. Median and greater wing coverts pure white ; the inner coverts 



shading into ashy. Bastard wing, primary coverts and primaries black. 



Outer secondaries black, the inner secondaries ashy brown or whitish at 



their bases and the innermost ones wholly ashy brown, glossed with dull 



metallic bluish green. 



Fig. I 50. 



Belaiiopterus chilensis. Diagram of wing showing spur. Reduced. 



Tail : Pure white for about the basal two thirds, then a broad black 

 band an inch and three quarters wide, and a terminal white band about 



