192 



297a. Falco albigidaris pax Chubb, Bull. B.O.C., S.E. Bolivia, 



xxxix., p. 23 (1918). [Charuplaya, Bolivia, N.W.Argentina, 

 type in coll. Brit. Mus.] 

 Bolivian White-throated Falcon. 



Wing c? 198 mm. ; " upper surface dark 

 slate grey instead of black ; below with 

 breast and sides of body dark brown, not 

 black, and much more broadly banded 

 with white. "1 



297b. Falco albigularis petoensis (Chubb), Bull. Yucatan. 

 B.O.C., xxxix., p. 22 (1918). [Pcto, Yuca- 

 tan, April 1888, Salv.-Godm. coll., type in 

 Brit. Mus.] 

 Yucatan White-throated Falcon. 



Wing ^ 190, $ 215 mm.; '' differs from F. r. 

 albigularis in being slate colour above, with 

 black shaft-Hnes, instead of black with 

 slightly paler margins ; bend of wing white 

 varied with buff ; breast and sides of 

 body blackish brown, instead of black, 

 and the white bars broader." 



■j"*298. Falco chicquera chicquera Daud., Traite, ii., Indian 



p. 121 (1800). [ex Levaill., Bengal.] Peninsula, 



Red-headed Merlin. E. to Assam. 



Wing <? 218, 228 mm. ; head and hind neck 

 chestnut red ; above pale bluish, with 

 remains of blackish cross bars, except on 

 back and scapulars ; tail narrowly barred 

 with black, with a broad black subterminal 

 band and white tips ; eyebrow and mous- 

 tachial stripe black ; forehead, sides of 



^ A larger series is necessary to show if this form is reallj' separable. I think 

 that the blackness of the upper breast and sides is an age character chiefly, as also 

 the amount of white. The same remark applies to the next form. Paraguayan 

 birds (F. ophryophanes Salvad.) appear to me indistinguishable from typical birds. 



