110 FALCONID. 
Juv. adulto similis, sed nigricanti-brunneus, facie laterali tota nigricanti-brunnea; corpore subtus pallide 
cervino-brunneo, plumis fuscescenti-brunneo marginatis; tibiis, crisso et subcaudalibus pallidioribus, 
concoloribus; cauda nigricanti-brunnea, albo terminata et fasciis duabus albis brunneo marmoratis notata. 
Long. tota circa 17°5, ale 9-0. (Descr. exempl. ex Panama. Mus. Brit.) 
Hab. Costa Rica, Talamanca (Gabd*); Panama (Mus. Brit.), Line of Railway 
(M‘Leannan °).—Sovutnh America, Amazonia *47, Guiana’. 
This species nearly equals 1, melanoleucus in size, and resembles that bird in having 
the under surface uniformly coloured. It may be distinguished, however, by the absence 
of any white or rufous collar on the hind part of the neck, and by the uniform white 
under wing-coverts. There are only three pale bands on the tail, instead of four, as in 
M. melanoleucus. Within our region, M. mirandollei, so far as at present known, is 
confined to Costa Rica and the State of Panama. In addition to the specimen obtained 
by Mr. M‘Leannan, there is another from Panama in the British Museum. 
Nothing has been recorded concerning the habits of this species, but they are 
probably similar to those of the other members of the genus. 
4, Micrastur guerilla. 
Micrastur guerilla, Cassin, Pr. Ac. Phil. 1848, p. 87'; Journ. Ac. Phil. i. t. 407; Scl. & Salv. 
P. Z. S. 1869, p. 867°; 1870, p. 8884; Salv. P. Z. S. 1870, p. 216’; Sharpe, Cat, Birds 
Brit. Mus. i. p. 79°; Ridgw. Pr. Ac. Phil. 1875, p. 486"; Sumichrast, La Nat, v. p. 285°; 
Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 126°; Richmond, Pr. U.S. Nat. Mus. xvi. 
p- 520%. 
Micrastur concentricus, Scl. P. Z. S. 1856, p. 285 "' (nec Less.). 
Micrastur giivicollis, Scl. P. Z. 8. 1858, p. 96" (nec Vieill.) ; Scl. & Salv. Ibis, 1859, p. 218”; 
Lawr. Ann. Lyc. N. Y. vii. p. 317. 
Micrastur xanthothorax, Scl. P. Z. 8. 1859, p. 368° (nec Temm.). 
Micrastur ruficollis, Scl. & Salv. Ibis, 1859, p. 218° (nec Vieill.). 
Supra saturate schistaceus, tectricibus alarum dorso concoloribus, majoribus autem et remigibus brunnescentior- 
ibus, his intus albo fasciatim notatis; rectricibus nigris, anguste albo terminatis et fasciis duabus 
albidis vel pallide brunnescentibus notatis ; facie laterali et gula totis schistaceis ; gastreo reliquo subtus 
toto albo et schistaceo-nigro regulariter transfasciato; tibiis, subcaudalibus, subalaribus et axillaribus 
pectore concoloribus et in eodem modo fasciatis. Long. tota circa 13:0, alee 6°75, caude 6°1, culm. 0°75, 
tarsi 2-4. (Descr. maris ex Rio Coco, Nicaragua, Mus. nostr.) 
2 ad. mari similis, sed magis brunnescens, cauda lineis angustis albis 4-fasciata; gastrei fasciis latioribus et 
brunnescentioribus. Long. tota circa 13°5, ale 6°9. (Descr. femine ex La Libertad, Nicaragua. Mus. 
nostr. ) 
Juv. Brunneus, pileo paullo saturatiore; torque cervicali albo interrupto; cauda nigra, albo terminata et 
anguste albo 4-fasciata: subtus albus, ochraceo lavatus, et fasciis paucis latis nigricantibus notatus ; 
subcaudalibus albidis, immaculatis ; facie laterali alba, brunneo maculata, regione parotica postice nigro 
circumdata. (Descr. femine juv. ex Rio Coco, Nicaragua. Mus. nostr.) 
Hab. Mexico, Jalapa (Pease1, de Oca'®, Hoge), Cuesta de Misantla (MZ. Trujillo), 
Orizaba, Uvero (Sumichrast®), Cordova (Sallé?1!); British Honpuras, Cayo, in 
the Western District (Blancaneaur); Guatemata (Skinner }8, Van Patten’ 1°), 
Vera Paz, Choctum (0. S. & I. D. G2); Honpuras, San Pedro (Whitely 4) ; 
