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102 FALCONIDA. 
almost co-extensive with that of the genus Leptodon. Its larger-billed representative, 
R. megarhynchus, appears to be a more western bird, and is found from Bolivia and 
Peru, northward to Western Mexico. The third species, R. wilson, is confined to 
the island of Cuba. 
1. Regerhinus uncinatus. 
Falco uncinatus, Temm. Pl. Col. 103, 104, 105°. 
Cymindis uncinatus, Scl. & Salv. Ibis, 1859, p. 219°; P.Z.S. 1864, p. 369 *; Lawr. Ann. Lyc. 
N. Y. ix. p. 134°. 
Leptodon uncinatus, Sharpe, Cat. Birds Brit. Mus. i. p. 380°; Boucard, P. Z. 8. 1878, p. 45°. 
Regerhinus uncinatus, Kaup, Ridgw. Bull. U.S. Geol. & Geogr. Surv. ii. p. 156"; Nutting, Pr. 
U.S. Nat. Mus. v. p. 403°. 
Supra schistaceus, unicolor: subtus dilutior, abdomine toto stricte albo transfasciato, tectricibus subcaudalibus 
albidis; subalaribus schistaceis albo transfasciatis, remigibus nigris griseo transfasciatis ; cauda nigra, 
albo terminata et griseo bifasciata: rostro plumbeo, mandibula et pedibus flavidis; cera et loris 
viridibus ; iride alba. Long. tota circa 17:5, ale 11-0, caude 8-0, tarsi 1-4. (Descr. exempl. ad. ex 
Yucatan. Mus. nostr.) 
Forma alia. Saturate schistaceus, fere unicolor ; cauda nigra albido terminata, fascia lata mediana alba. 
Forma alia. Fuliginosus, unicolor; cauda nigricante, fasciis duabus sordide albis notata; remigibus subtus 
albido maculatis. 
Juv. Fuscus, plumis stricte rufo limbatis, cervice postica et corpore subtus albis, hoe fusco fasciato; tibiis 
rufo fasciatis; alis subtus stricte fulvo fasciatis, remigibus nigris griseo fasciatis; cauda nigra, fusco- 
albido trifasciata. 
Hab. Mexico, Buctzotz in N. Yucatan (Gaumer); GuaremMata (Skinner?) ; Costa Rica, 
San José (Frantzius*), Naranjo (Boucard®), La Palma (Nutting §), Barranca 
(FE. Arcé); Panama (2. Arcé, Reeves’), Lion Hill (d‘Leannan *).—Sourn AMERICA 
to Bolivia °®. 
Sent us by Skinner from Guatemala and recorded by M. Boucard® as having been 
found by him in April in Costa Rica, where he says its cry resembled that of a 
Peacock, and though occurring in several places in that country the species is nowhere 
plentiful. 
Mr. Nutting also relates that at La Palma, in the Gulf of Nicoya, this Kite is 
frequently heard, especially in the evening. 
2. Regerhinus megarhynchus. 
Regerhinus megarhynchus, Des Murs, in Castein. Voy., Ois. p. 9, t. 1 (1855) ’; Ridgw. Bull. U.S. 
Geol. & Geogr. Surv. 11. p. 160°; Gurney, Ibis, 1880, p. 318°. 
Leptodon megarhynchus, Sharpe, Cat. Birds Brit. Mus. i. p. 332+. 
Cymindis uncinatus (nec Temm.), Lawr. Bull. U.S. Nat. Mus. no. 4, p. 43°. 
Leptodon uncinatus (nec Temm.), Sumichrast, La Nat. v. p. 237°. 
R, uncinato similis, sed rostro valde majore et crassiore ; cera lorisque viridibus; macula suboculari flava ; 
pedibus aurantiacis ; iride alba. Long. tota circa 17-0, ala 12:4, caude 8-4, culm. 1°7, tarsil‘5. (Descr. 
exempl. ex Tonala, Chiapas. Mus. nostr.) 
