REGERHINUS.—ICTINIA. 103 
Hab. Mexico, Uvero, Cosamaloapam, Chihuitan, Santa Efigenia, Cacoprieto, Tonala 
(Sumichrast > °)—Sourn America to Bolivia 4. 
Rf. megarhynchus is the large-billed form of R. uncinatus, first recorded from Bolivia, 
later from Peru. We have a specimen from Bahia and another from the Upper Amazons; 
Gurney mentioned a pair from Mexico in the Norwich Museum, and subsequently we 
obtained a series from that country collected by Sumichrast. The changes of plumage 
are identical with those of £. wncinatus and melanistic examples also occur. 
Sumichrast © states that its iris is white, the cere and lores green, the spot below the 
nostril and eye yellow, the feet orange. In a fresh state the young may be easily 
recognized by the yellow naked skin between the eye and the bill, so conspicuous in 
the adult. Its habits are similar to those of L. cayennensis, frequenting the vicinity of 
water and feeding upon molluscs and gastropods. 
ICTINIA. 
Ictinia, Vieillot, Anal. p. 24 (1816) ; Sharpe, Cat. Birds Brit. Mus. i. p. 364. 
On account of its toothed bill, Dr. Sharpe has placed this genus in his subfamily 
Falconine, together with Baza and Harpagus. Other important characters would, 
however, in our opinion, suggest /ctinia being included among the Kites in the vicinity 
of Elanus and Leptodon, although wanting the characteristic soft plumage of these 
genera. The tail of [ctinia is not forked as in Hlanus, and Mr. Ridgway distinguishes 
the former genus by the transverse scutelle of the tarsus and the grooving of the 
lower surface of the claws. 
Two species are known, J. mississippiensis and I. plumbea: the former an inhabitant 
of the Southern United States and apparently rare in Central America; the latter more 
widely distributed throughout our region and in South America. 
1. Ictinia plumbea. 
Spotted-tailed Hobby, Lath. Gen. Syn. i. p. 106’. 
Falco plumbeus, Gm. Syst. Nat. i. p. 283°; Temm. Pl. Col. 180°. 
Ictinia plumbea, Vieill. N. Dict. d’ Hist. N. xvi. p. 76*; Scl. P.Z.S. 1856, p. 285°; 1859, pp. 368°, 
390"; Scl. & Salv. Ibis, 1859, p. 220°; Salv. Ibis, 1861, pp. 140°, 146°; 1890, pp. 84", 89"; 
P. Z. S. 1867, p. 158" ; 1870, p. 216“; Lawr. Ann. Lye. N. Y. vii. p. 289"; Bull. U. S. 
Nat. Mus. no. 4, p. 43"; Sharpe, Cat. Birds Brit. Mus. i. p. 364'7; Sumichrast, La Nat. v. 
p. 287*° ; Boucard, P. Z. S. 1883, p. 457° ; Ferrari-Perez, Pr. U.S. Nat. Mus. ix. p. 168”. 
Supra nigricans, schistaceo adumbrata; alis caudaque nigris, primariis intus castaneis, extus et ad apicem 
nigris; rectricibus intus maculis duabus albis fasciatim notatis; pileo et cervice clare cinereis, inter- 
scapulio quoque clare cinereo lavato; plumis anteocularibus et palpebra nigris; facie laterali et corpore 
subtus toto cum subalaribus cinereis, gula vix pallidiore: rostro nigro; pedibus brunneis ; iride coccinea. 
Long. tota circa 12°5, ale 12-2, caude 5:0, tarsi 1-45. (Descr. maris ex Peten. Mus. nostr.) 
9 mari similis, sed rectricibus fascia tertia basali alba. Long. tota circa 12°0, ale 11:7. (Descr. femine ex 
Peten. Mus. nostr.) 
