6 TYRANNIDA. 
in the forests of the Pacific slope between the port of Champerico and Retalhuleu. 
Mr. Gaumer’s specimen from Orange Walk was obtained close to the level of the sea. 
It only occurs in dense high forests, where it keeps about the growth of underwood. 
Mr. Nutting obtained one specimen at Sucuyd in Nicaragua in deep woods. Both 
P. cancrominus and P. albogularis have a close ally in P. mystaceus of Guiana and 
Brazil, but both the northern species have a whiter throat, and, moreover, P. albogu- 
laris has a black mandible. 
2. Platyrhynchus albogularis. 
Platyrhynchus albogularis, Scl. P. Z. 8.1860, pp. 68*, 92°, 295°; Salv. Ibis, 1869, p. 314‘; P.Z.S. 
1870, p. 196°; Berl. & Tacz. P. Z. S. 1883, p. 553°; Tacz. Orn. Pér. ii. p. 2257; Scl. Cat. 
Birds Brit. Mus. xiv. p. 67, t. 8. f. 2°. 
Platyrhynchus cancroma, Cass. Pr. Ac. Nat. Se. Phil. 1860, p. 144°. 
Platyrhynchus cancrominus, Lawr. Ann. Lyc. N.Y. ix. p. 110°; v. Frantz. J. £. Orn. 1869, p. 306". 
P. cancromino similis, sed supra obscurior, oculorum ambitu (preeter ciliam ochraceam) nigricantiore, mandibula 
 quoque nigricante differt. 
Hab. Costa Rica‘, Navarro (J. Cooper, v. Frantzius1!), Irazu (Rogers), Naranjo (J. 
Carmiol 1°); Panama, Volcan de Chiriqui®, Calovevora*®, Calobre ® (Arcé); Panama, 
nece-Truando (Wood ®).—VeEnezunta; Ecuapor!23¢; Prru?, 
Western America, from Peru to Costa Rica, and thence eastwards to Venezuela, 
defines the limits of the range of this Platyrhynchus. Immediately to the northward 
in Nicaragua its place is taken by P. cancrominus. It is thus found throughout 
Panama and Costa Rica in company with P. superciliaris. Mr. Wood observed it on the 
Truando river, near its junction with the Atrato, in high trees, whence it was difficult 
to obtain®. Fraser met with it in the dark underwood of the forest at Esmeraldas 3, as 
well as in other places in Western Ecuador ! ?, and we have a specimen from Santa Rita 
in the same region, and Stolzmann also found it at Chimbo®. In Peru the last-named 
collector obtained an example at Tambillo, at an elevation of 5800 feet above the sea’. 
Jelski remarks that its note is monotonous, and that it perches on the small branches 
of the forest trees. 
The existence of a vertical yellow crest does not seem to be always a characteristic 
of the male, for one of Stolzmann’s Chimbo female specimens had this crest well 
developed. | 
b. Caput castaneum, stria superciliaris utrinque nigra. 
8. Platyrhynchus superciliaris. 
Platyrhyncha cancroma, Lawr. Aun. Lyc. N. Y. vii. p. 830°. 
Platyrhynchus superciliaris, Lawr. Ibis, 1863, p. 184°; Ann. Lye. N. Y. viii. p. 7°, ix. p. 110‘; 
Salv. P.Z. 8. 1867, p. 146°, 1870, p. 196°; Ibis, 1885, p. 2927; Scl. Cat. Birds Brit. Mus. 
Xlv. p. 68°. 
