592 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



d. Back and upper surface of wings darker — fuscous-black. 



M. chimachima paludivagus, ad. (extralimital) " 

 dd. Back and upper surface of uings lighter— dark sepia to fuscous (Pan- 

 ama to ColomV>ia, Venezuela, and British Guiana), 



M. chimachima cordatus, ad. (p. 592) 

 cc. Underparts heavily marked with dark brown. 



M. chimachiraa paludivagus, juv., (extralimital) 

 M. chimachima cordatus, juv. (p. 593) " 



MILVAGO CHIMACHIMA CORDATUS Bangs and Penard 



Northern Carrion Falcon 



Adult (sexes alike).— Forehead, crown, occiput, nape, lores, cheeks, 

 auriculars, chin, throat, sides of neck, breast, abdomen, sides, flanks, 

 thighs, under tail coverts, and under wing coverts pinkish buff to 

 warm buff, some of the feathers of the crown, occiput, and nape with 

 pale tawny-olive to pale Saccardo's umber edgings, which produce a 

 rather faintly streaked appearance; the upper eyelashes and a narrow 

 line extending from the posterior end of the eye to the posterolateral 

 corner of the crown black; the feathers of the hind margin of the nape 

 broadly fuscous subterminally, tipped with warm buff or pinkish buff; 

 scapulars, interscapulars, back, rump, upper \nng coverts, and 

 remiges dark sepia to dark fuscous, the feathers narrowly tipped (in 

 fresh plumage) with pale buffy white; primaries pale pinlvish buff to 

 pale warm buff on both webs on their basal half or more, the light areas 

 reaching the outer webs just proximal to their emargination ; the pale 

 areas mottled with fuscous on the outer web, indistinctly barred (five 

 to seven bars) with drab to hair brown on the inner webs, the bars 

 becoming darker and broader on the inner primaries, dark sepia on the 

 innermost pair; the outer secondaries incompletely barred with four 

 to six broad pale warm buff bars on the basal two-thirds of their inner 

 webs, the bars not reaching the shaft; fourth and fifth primaries (from 

 outside) the longest, then the third, sixth, second, seventh; upper tail 

 coverts pale warm buff transversely spotted with fuscous, sometimes 

 immaculate; rectrices warm buff, usually paler, almost cartridge buff 

 on the median pair, broadly banded subterminally with fuscous (the 

 band 30-50 mm. wide) and crossed by from seven to nine narrower 



12 Mjlvago chimachima (not of Vieillot) Berlepsch, Nov. ZooL, xv, 1908, 289 

 (Apfrouague, Cayenne) ; Sharpe, Hand-list, i, 1899, 244, part (Guianas); Brabourne 

 and Chubb, Birds South Amer., i, 1912, 63, part (Guianas) .—Milvago chimachima 

 chimachima Bangs and Fenard, Bull. Mus. Comp. ZooL, Ixii, 1918, 35 (Paramaribo, 

 Surinam); Swann, Synop. Accip., pt. 1, 1921, 15, part (Guianas).— Milvago 

 chimachima pahidivaga Penard, Proc. New England Zool. Club, viii, 1923, 36 

 (Erste Rijweg, Paramaribo, Surinam; coll. T. E. Penard, now in Mus. Comp. 

 ZooL). — Milvago chimachima paludivagus Peters, Check-list Birds of World, i, 

 1931, 279. 



" I know of no certain way of telling the young of these two races apart. 



