108 PALCONID^. 



Sparvius semitorquatus, Vieill. N. Diet. d'Hist. N. x. p. 322 ^ 



Micrastur semitorquatus, Strickl., Scl. & Salv. Ibis, 1859, p. 218 ' ; Salv. P. Z. S. 1870, p. 216 " ; 



Cat. Strickl. Coll. p. 497' ; Lawr. Ann. Lye. N. Y. ix. p. 134'; Mem. Bost. Soc. N. H. ii. 



p. 299 ' ; Bull. U. S. Nat. Mus. no. 4, p. 40 '; v. Frantz. J. f. Om. 1869, p. 369 " ; Sharpe, 



Cat. Birds Brit. Mus. i. p. 75 " ; Boucard, P. Z. S. 1878, p. 44 " ; Sumichrast, La Nat. v. 



p. 235 "; Salvad. & Festa, Boll. Mus. Torino, xiv. no. 339, p. 10 ". 

 Clitnacocercus semitorquatus, Cab. J. f . Om. 1865, p. 407 ". 

 Sparvius melanoleucus, Vieill. N. Diet. d'Hist. N. x. p. 327 ". 

 Micraslur melanoleucus, Ridgw, Pr. Ac. Phil. 1875, p. 482"; Nutting, Pr. IT. S. Nat. Mus. vi, 



p. 377 "; Boucard, P. Z. S. 1883, p. 457 " ; Kichm. Pr. U. S. Nat. Mus. xviii. p. 628"; 



Bangs Pr. N. Engl. Zool. Club, ii. p. 15 ='. 

 Falco percontator, Cabot, Journ. Bost. Soc. N. H. iv. p. 462"'. 



Supra niger, snpracaudalibas albo angnste tenninatis et latius trausfasciatis ; remigibus nigricantibus, obscure 

 brunneo, intus albo fasciatis ; cauda nigra, albo terminata et fasciis albis 4-fasciata ; pileo nigro ; torque 

 coDari albo ; genis et regione parotica albis, griseo adumbratis, hac fascia circulari nigra circumcineta ; 

 corpore subtns albo, rhachidibns nigris vix evidentibns ; subalaribus albis, nigro macolatis ; axillaribus 

 albis, striis rhachidaUbns nigris : rostro nigro ; cera, loris efc orbitis nudis oUvascenti-viridibus ; pedibns 

 flavis; iride pallide bninnea. Long, tota circa 22-0, alaB 10-8, candae 10-4, culm, l-l, tarsi 3*35. 

 (Descr. maris ex Colima. Mas. nostr.) 



Juv. ab adolto valde dissimilis. Ifigricanti-branneus, torque collari ochraceo interrupto; alis caadaque 

 brunneis, ut in adulto fasciatis ; genis et facie laterali et corpore subtns toto pallide ochrascenti-fulvis, 

 fasciis latis cordiformibus vel transversis regulariter vittatis. Long, tota circa 23-5, alae 10-5. (Descr. 

 exempl. ex Medio Monte, Gnatemala. Mus. nostr.) 



Eab. Mexico, both coasts {Sumichrast ^^), Mazatlan ( Grayson *), Presidio de M azatlan 

 (Forrer), Sierra Madre de Colima (Xantvs^'^), Plains of Colima, Tehuantepec 

 {Richardson), Mirador {Sartorius ^"), Tehuantepec city ^ i^, Santa Efigenia ', 

 Tonala {Sumichrast), Altamira, Tampico {Armstrong ^^), Yucatan {Cabot ^, 

 Gaumer^^); Guatemala {Constancia^, Skinner'^), Retalhuleu, Medio Monte, 

 Savana Grande {0. S. & F. B. G.); Salyadok, La Libertad {Bichardson) ; 

 NicAEAGTTA, San Juan del Sur {Nutting ^^} ; Costa ErcA {v. Frantzius ^^), San Jose, 

 Angostura {Carmiol ^^), Las Cruces de Candelaria, Rancho Redondo (». Frantzius ^^, 

 Zeledon''), Candelaria Mts. (^OMcard ^^j^ Talamanca, lApurio {Gaib^''), Sibahue, 

 Irazu, Bebedero ( Underwood) ; Panama, Mina de Chorcha {JS. Arce ^), Lion Hill 

 {M'Leannan ^'', Brown ^i), Laguna de Pita {Festa ^^). — Sooth Ameeica generally 

 to Paraguay ^ ^ ^^, 



We agree with Mr. Ridgway ^^ that melanoleuctui is a more correct name for this 

 Hawk than that of semitorgttatus, both having been published in the same work ^ ^^. 

 It is the largest member of the gentis Micrastur, and is further distinguished from the 

 smaller forms, such as M. guerilla and its allies, by the uniformly coloured under 

 surface. M. melanolexwus is found throughout the greater part of the forest country 

 of the Neotropical region, from Mexico to Brazil and Paraguay. Although most of 

 our specimens come from the western provinces, Sumichrast ^^ states that it inhabits 

 the " tierra caliente " of both coasts of Mexico. Mr. Armstrong, moreover, met with 



