26 TYRANNIDZ. 
which lie on the eastern side of the Cordillera. Our specimens from Costa Rica and 
Panama are also from the Atlantic side of the mountains. 
The specimen obtained by Salvin at San Pablo Station on the Panama Railway was 
shot from a tree on the edge of the forest near the railway-bridge which crosses the 
Chagres river at Barbacoas. 
MYIOPAGIS, gen. nov. 
(Type Elainea placens, Scl.) 
The form of the nostril of Elainea placens and its allies makes it necessary to separate 
this section of Elainea and place it under a distinct generic name ; and though the out- 
lines of the bill of Myiopagis are similar to those of H. pagana, we think that it is 
best placed near Leptopogon, which has somewhat similar nostrils, but a higher, more 
compressed bill. 
The species we think ought to be removed from Elainea and placed under the new 
genus are:—HL.. placens, E. subplacens, E. cotta, E. gaimardi, E. flavivertex, E. caniceps, 
and perhaps L. rujficeps. 
The general colours of the plumage of Myiopagis are olive above, with greyish throat 
and yellowish abdomen ; there is also a concealed vertical crest of yellow or white: this 
crest is not, like that of Hlainea, simply a few white feathers, but one constructed after 
that of Tyrannus and many other genera of this family. 
The bill is moderately long, the sides nearly straight, converging gradually from the 
gape, the width of which is about half the length of the tomia; the nostrils are open, 
oval, and placed at the end of the nasal fossa, a membrane bordering them along the 
upper and hinder edges; the rictal bristles are moderately developed, hardly so much 
so as in Hlainea; the tarsi are moderately stout and covered with distinct scutelle ; the 
outer toe is a little less than the inner toe; the 3rd and 4th quills are the longest in 
the wing; 5th> 2nd, lst=8th; the tail is long and scarcely emarginate, nearly =wing, 
wing nearly =4 tarsus. . 
The distribution of Myiopagis includes nearly the whole of tropical America from 
Southern Mexico to Paraguay. 
1. Myiopagis placens. 
Elainea placens, Scl. P. Z. 8.1859, p.46*; Cat. Birds Brit. Mus. xiv. p. 148°; Scl. & Salv. Ibis, 1859, 
p- 128, t. 4. f£.2°; P. Z. 8.1864, p.359*; Salv. Ibis, 1860, p. 194°; P.Z.S. 1870, p. 197°; 
Lawr. Ann. Lyc. N. Y. vii. p. 8287, ix. pp. 112°, 201°; Mem. Bost. Soc. N. H. ii. p. 286"; 
Grayson, Pr. Bost. Soc. N. H. xiv. p. 279"; Ridgway, Pr. U. S. Nat. Mus. viii. p. 571”. 
Elainea, sp.?, Scl. P. Z. 8. 1856, p. 297, no. 113. 
Sylvia viridicata, Vieill. N. Dict. d’Hist. N. xi. p. 171? (of. Scl. Cat. Birds Brit. Mus. xiv. p. 148). 
Muscicapa viridicata, @Orb. Voy. Ois. p. 325”. 
Elaenea regulus, Licht. Nomencl. p. 17 °°. 
