118 FALCONIDA., 
Supra niger, plumis dorsi secundariis intimis et tectricibus alarum sordide schistaceo limbatis ; remigibus 
nigris, intus rufo fasciatim maculatis; cauda nigra, albido terminata, fasciis albidis (duabus celatis) 
quinque notata ; pileo toto, facie laterali, regione parotica genisque nigerrimis; colli lateribus et gutture 
albis, illo aurantiaco-castaneo valde tincto; prepectore presertim aurantiaco-castaneo, plumarum 
rhachidibus nigro indicatis; pectore, cum hypochondriis, subalaribus et axillaribus nigris fasciis vel 
maculis rotundatis albidis aut aurantiacis notatis; abdomine, tibiis et subcaudalibus castaneis, his 
longioribus nigro distincte transfasicatis. Long. tota 14:5, ale 11-2, caude 4:4, culm. 0-9, tarsi 1°55. 
(Descr. femine ex Guatemala. Mus. nostr.) 
3 femine similis, sed minor. Long. tota 15:7, ale 11-4. (Descr. maris ex Bugaba. Mus. nostr.) 
Juv. adultis similis, sed notei plumis omnibus rufo nec schistaceo limbatis; supracaudalibus albo trans- 
fasciatis ; rectricibus nigris, albo terminatis et albido 5-fasciatis ; facie laterali nigerrima; gutture albo; 
prepectore rufescente, nigro striolato; corpore reliquo subtus nigro et ochraceo variegato, plumis nigris, 
ochraceo marginatis et fasciatis, rarius maculatis. Long. tota 15:5, ale 11°38. (Deser. exempl. ex Costa 
Rica. Mus. nostr.) 
Hab. Guaremana, Vera Paz (Meany *); Nicaragua, Matagalpa (Richardson) ; Costa 
Rica, La Palma (v. Frantzius®, Zeledon *, Carmiol); Panama, Bugaba (E. Arcé*). 
—Sourn AMERICA to Guiana’, Venezuela’, and Brazil’. 
This very rare Falcon is a large form of I. rufigularis, and but few specimens are to 
be found in Museums. In 1860 we secured from Mr. Meany, of Guatemala, a fine 
adult female, which he obtained in Vera Paz; this specimen, which is figured on our 
Plate, is the only one known to us from that country. In Costa Rica it is apparently 
of more frequent occurrence, having been procured by several collectors. 
Nothing is known of its habits or breeding. 
5. Falco fusco-czrulescens. 
Alconcillo aplomado, Azara, Apunt, i. p. 175". 
Falco fusco-cerulescens, Vieill. N. Dict. d’Hist. N. xi. p. 90°; Sharpe, Cat. Birds Brit. Mus: i. 
p- 400°; Sumichrast, La Nat. v. p. 287*; Bendire, Life Hist. N. Amer. Birds, p. 306, 
pl. x. figs. 9,10°; Fisher, Bull. U.S. Dep. Agr. no. 3, p. 114°; A. O.U. Check-l. N. Amer. 
Birds, p. 1397; Richmond, Pr. U. 8. Nat. Mus. xviii. p. 628°. | 
Faico femoralis, Temm. Pl. Col. tt. 121, 343°; Finsch, Abh. nat. Ver. Bremen, 1870, p. 362”. 
Hypotriorchis femoralis, Scl. P.Z.S. 1856, p. 285"; 1859, p. 368%; Scl. & Salv. Ibis, 1859, 
p. 219”; Lawr. Mem. Bost. Soc. N. H. ii. p.301“; Bull. U. S. Nat. Mus. no. 4, p. 39"; 
Boucard, P. Z. S. 1883, p. 457 ©. 
Pulchre schistaceus, pileo vix saturatiore; fascia supraciliari ferruginea albo mixta in torquem cervicalem 
extensa ; alis dorso concoloribus, primariis intus albo fasciatim notatis, secundariis et primariis intimis 
albo terminatis; supracaudalibus schistaceis, nigro et albido indistincte fasciatis ; cauda schistaceo- 
nigra, albo terminata et griseo 6-fasciata; regione parotica et gutture albidis rufo lavatis, fascia una 
schistaceo-nigra suboculari et altera supra regionem paroticam extensa; gutture imo et prepectore 
pallide castaneo-rufis ; pectore toto, hypochondriis axillaribusque schistaceo-nigris, lineis albis trans- 
fasciatis; abdomine, tibiis et subcaudalibus pallide castaneo-rufis ; subalaribus albis, rufo tinctis, plus 
minusve nigro maculatis ; remigibus infra regulariter albo fasciatis. Long. tota 12:3, ale 8-9, caude 6-2, 
culm. 0°85, tarsi 1°8. (Descr. maris ex Costa Rica. Mus. Brit.) 
Q mari, ut videtur, similis, sed multo major, et coloribus minus vividis; plaga nigra pectorali anguste nigro 
transfasciata. Long. tota 18°5, ale 11:6. (Descr. exempl. ex Corpus Christi, Texas. Mus. nostr.) 
Juv. adultis similis, sed notei plumis brunnescentibus vix rufo marginatis : subtus ochraceus, nigro striolatus, 
pectoris plumis nigris, haud transfasciatis. (Descr. exempl. ex Veragua. Mus. nostr.) 
