282 . -TROCHILIDA. 
Trochilidées,’ under the name of Ramphodon anais, seems to have confused it with 
the South-American bird we now know as P. tolata. His first description of R. anais 
was based upon a Mexican specimen. | 
P. thalassina may readily be distinguished from P. cyanotis by its blue abdomen. 
In very adult birds the chin is slightly tinged with blue, but not nearly so much so as 
in P. iolata. | 
2. Petasophora cyanotis. 
Trochilus cyanotus, Bourc. & Muls. Ann. Sc. Phys. et Nat. Lyon, vi. p. 41+. 
Petasophora cyanotus, Gould, P. Z. 8S. 1847, p. 8°. 
Petasophora cyanotis, Gould, Mon. Troch. iv. t. 228 (May 1853)°; Cab. J. f. Orn. 1863, p. 162°; 
Lawr. Ann. Lyc. N. Y. ix. p. 125°; Frantz. J. f. Orn. 1869, p. 316°; Salv. P. Z. 8S. 1870, 
p. 2107; Cat. Birds Brit. Mus. xvi. p. 110°; Boucard, P. Z. S. 1878, p. 69°; Nutting, Pr. 
U.S. Nat. Mus. v. p. 500”; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 121”. 
Petasophora cabanidis, Heine, J. f. Orn. 1863, p. 182”. 
Petasophora cabanisi, Lawr. Aun. Lyc. N. Y. ix. p. 126”. 
P. thalassine similis, sed colore violaceo a mento et abdomine medio omnino absente. 
Hab. Costa Rica (Carmiol, Endres), Barranca®, Dota®, Grecia (Carmiol), Cartago 
(Cooper °), Orosi (Kramer ®), Irazu (Boucard®, Rogers®), La Palma (Nutting 1°), 
Faldas de Irazu (Zeledon''), Las Cruces de Candelaria (Zeledon); Panama, 
Volcan de Chiriqui, Chitra, Calovevora (Arcé’).—Sovura America, Andes, from 
Colombia and Venezuela! to Bolivia’. 
Birds of this species from Costa Rica have been separated from the South-American 
form both by F. Heine and Mr. Lawrence under the names of P. cabanidis and 
P. cabanisi; but their comparisons are chiefly made with P. thalassina, which is certainly 
a distinct species. ‘The differences observable between the Costa Rican and Andean 
birds are very slight, and consist in the former being rather darker on the abdomen 
and in the bright feathers of the throat spreading further over the breast. We doubt 
if even these slight characters are constant, but due in a great measure to the way the 
skins are made up. 
P. cyanotis is a common bird in the highlands of Costa Rica and the State of Panama. 
A gap then occurs in its range, and it reappears in the Andes of Venezuela and 
Colombia, and thence passes southwards as far as Bolivia. 
Ptilosis plerumque fusca. 
3. Petasophora delphine. 
Ornismya delphine, Less. Rev. Zool. 1839, p. 444. 
Petasophora delphine, Gould, P. Z. S. 1847, p.9°*; Mon. Troch. iv. t. 229 (May 1853) °; Salv. 
This, 1860, pp. 194°, 195°, 261°, 2767; 1872, p. 320°; P. ZS. 1870, p. 210°; Cat. 
Birds Brit. Mus. xvi. p. 111; Scl. & Salv. P. Z. 8.1870, p. 837". 
Fusco-brunnea, tectricibus supracaudalibus obscurioribus et cum uropvgio ferrugineo terminatis: subtus 
