BRASSOLIS.—OPSIPHANES. | 125 
1. Brassolis isthmia. (Tab. XII. figg. 5,64; 7,89.) 
Brassolis isthmia, Bates, Ent. Monthl. Mag. i. p. 164’. 
3. Alis fuscis, anticis fascia transversa lata a costa per cellule finem ad angulum analem eunte, fulva et apud 
cellule finem macula fusca notata, posticis linea angusta ramo mediano primo attingente fulva; subtus 
alis dilutioribus et albido irroratis, fascia fulva anticarum paging superioris costam versus interrupta, linea 
duplici submarginali nigra et ocello nigro apud apicem ornatis; posticis ocellis tribus notatis, uno ad cost 
medium altero ultra cellulam, altero ad angulum analem, et maculis duabus fulvis ad basin ornatis. 
@ mari similis, sed major, et posticis omnino fuscis distinguenda. . 
Hab. Nicaragua, Chontales (Belt); Panama, Lion-Hill Station (J‘Leannan 3), 
Flamenco Island (0. S.). 
Our first specimens of this insect were two males captured by M‘Leannan on the 
Panama railway. ‘These were recognized by Mr. Bates, into whose hands they passed, 
as distinct from B. sophore, and described by him. Since then Salvin obtained a female, 
which he caught one evening in April 1873 on board ship when lying off Flamenco 
Island in the Bay of Panama; and we have received other examples from the State of 
Panama. A pair were also taken by Mr. Belt in Nicaragua, which agree fairly with 
the Panama insect; the male, however, wants the tawny streak of the secondaries. 
b. isthmia differs from B. sophore in the absence of the tawny markings of the secondaries; 
the males, however, have a fine linear tawny streak on the side of the first median branch ; 
but this is absent in the females. ‘The third species of the genus, B. astyra, which is 
from Brazil, is also closely allied. This, though it wants the tawny markings of B. sophore, 
may readily be distinguished from both the northern forms by being of a much darker 
brown colour. 
The male specimen figured came from Lion Hill, and the female from Flamenco 
Island. 
OPSIPHANES. 
Opsiphanes, Doubleday, Gen. Diurn. Lep. p. 344 (1851). 
This genus as at present constituted contains some twenty species, which are spread 
over the whole of Tropical America from Mexico to Southern Brazil. These are 
divisible into several groups, and it is very probable that at some future time it will be 
found advisable to split up the genus into several minor ones. 
In Mexico and Central America eight species have hitherto been found, representing 
most of the groups into which the genus seems divisible. The section, however, repre- 
sented by Opsiphanes syme has not yet been discovered anywhere but in South-eastern 
Brazil; and there is no species exactly answering to O. zanthus of Guiana. 
The chief characters by which Opsiphanes may be known are, taken together :—the 
large size of the prediscoidal cell of the secondaries; a denuded patch on the submedian 
nervure of the secondaries in the male with or without a central pencil of hair, as in 
Caligo; the coxa of the front legs of the male is short and stout, and shorter than the 
