574 BULLETIN 5 0, UNITED STATES NATIONAL MUSEUM 



Micrastur mirandolli Zeled6n, Anal. Mus. Nac. Costa Rica, i, 1887, 122 (Costa 

 Rica) , 



Micrastur mirandollei Sharpe, Hand-list, i, 1899, 246, part (Panama). — Salvin 

 and GoDMAN, Biol. Centr.-Amer., Aves, iii, 1901, 109, part (Talamanca, 

 Costa Rica; Panama RailwajO- — Carriker, Ann. Carnegie Mns., vi, 1910, 

 452 (Talamanca, Costa Rica). — Stone, Proc. Acad. Nat. Sci., Philadelphia, 

 1918, 248 (Panama Canal Zone). — Swann, Synopt, List Accip., pt. 1, 1919, 

 15, part; Synop. Accip., pt. 1, 1921, 25, part; Monogr. Birds Prey, i, 1925, 144, 

 part (monogr.). — Peters, Check-Hst Birds of World, i, 1931, 277, part. — 

 Griscom, Bull. Mus. Comp. Zool., Ixxii, 1932, 317 (Permd, Obaldia, Panama; 

 plum.); Auk, 1, 1933, 303 (Rfo Chepo, Dari^n; spec); Bull. Mus. Comp. 

 Zool., Ixxviii, 1935, 302 (Panama; scattered records from Caribbean slope; 

 1 from Pacific slope). — Dugand, Caldasia, No. 3, 1941, 58 (Rfo Jurad6, 

 Colombia; spec; plum.; meas.). 



Micrastur mirandollei extimus Griscom and Greenway, Bull. Mus. Comp. Zool., 

 Ixxxi, 1937, 418 (Perm6, Caribbean slope of extreme e. Panama). — Anonymous, 

 Auk, liv, 1937, 562, in text (Perme, Panama). — Gyldenstolpe, Kungl. 

 Svenska Vet.-Akad. Handl., xxii. No. 3, 1945, 30, in text (e. Panama). 



MICRASTUR RUFICOLUS GUERILLA Cassin 



Mexican Barred Forest Falcon 



Adult male. — Forehead, crown, occiput, nape, scapulars, interscapu- 

 lars, back, rump, upper tail coverts, lesser and median upper wing 

 coverts deep neutral gray to dark slate color; greater upper wing 

 coverts and remiges dark mummy brown, the remiges incompletely 

 barred with grayish white to white on the basal two-thirds of the 

 inner webs; rectrices black with a very faint bluish sheen, tipped 

 narrowly with white and crossed by three equally spaced narrow 

 white bars, the bars narrow on both webs of the median pair of 

 rectrices, wider on the inner webs and narrower and grayer on the 

 outer webs of the more lateral ones, and not extending to the outer 

 webs of the outermost two feathers; lores and circumorbital area 

 bare; cheeks and auriculars like the crown and nape but slightly 

 paler; chin, upper throat and sides of upper neck pale mouse gray; 

 lower throat, breast, abdomen, sides, flanks, thighs, under tail coverts, 

 and under wing coverts white finely barred with blackish, the bars 

 having a slight fuscous tinge, the bars less numerous, more widely 

 spaced, shomng more of the white on the lower abdomen, thighs, 

 flanks, and under tail coverts, the middle of lower abdomen and under 

 tail coverts sometimes almost unbarred; iris light orange-brown; 

 orbital skin, lores, cere, tarsi, and toes orange-yellow; maxilla black- 

 ish, mandible dull yellowish orange; claws plumbeous. 



Adult female. — Similar to the adult male, but with the scapulars, 

 interscapulars, back, rump, upper tail coverts and all the upper wing 

 coverts dark mummy brown to dark sepia, the forehead and crown 

 the same but washed with deep neutral gray; cheeks, auriculars, chin, 

 and upper throat grayish drab; iris yellow; orbital skin, lores, and cere 



