26 RHOPALOCERA. 
This is a somewhat isolated species, having no very near allies, though C. cleis 
appears to be its next of kin. Great variation, irrespective of sex, is noticeable in the 
black median band of the secondaries. In the majority of specimens an isolated black 
spot beyond the end of the cell is all that is shown. In some a well-defined black 
band is present ; and between these extremes every gradation can be traced. 
The species seems to be abundant in Nicaragua and Costa Rica, but does not pass 
much beyond these limits, as we have as yet only seen a single specimen from the State 
of Panama and none from more northern districts. 
Our figures are taken from two male specimens, one (fig. 6) from Costa Rica 
(agreeing exactly with the types), the other (fig. 7) from Nicaragua. 
NAPEOGENES. 
Napeogenes, Bates, Trans. Linn. Soc. xxiii. p. 533 (1861). 
Tarsus of female with four joints, a pair of spurs on each of the second and third 
joints; primaries with recurrent nervule on upper discocellular; no recurrent nervule 
on secondaries ; median nervure and discocellulars of secondaries nearly in a line; cell 
very long. 
Mr. Bates, when describing this genus in 1861, enumerated seventeen species as 
belonging to it. Subsequent researches have since more than doubled this number. 
Though well represented in the valley of the Amazons, the genus has many species 
inhabiting the slopes of the Andes from Bolivia to Colombia; but none of them have 
a wide range. Central America has but three—one (J. tolosa) extending from Mexico 
to Panama, one peculiar to Costa Rica, and one restricted to Panama. 
The genus is an extremely interesting one, from the fact that almost all its members 
mimic some commoner species of Jthomia found in the same district. Dr. Boisduval 
(Lep. Guat. p. 32) includes two other species of this genus as found in Central America 
under the names Ceratonia stella (Hew.), from Nicaragua, and Choridis peridia (Hew.), 
from Costa Rica; but both are Colombian species, from which country doubtless his 
specimens came. | 
1. Napeogenes hemimelena. (Tab. III. fig. 3.) 
Napeogenes hemimelena, Godm. & Salv. P. Z.S. 1877, p. 60°. 
9 alis anticis nigris, flavo maculatis, maculis duabus discalibus, una majore extra cellulam venis divisa, duabus 
inter ramos medianos, serie quoque punctorum submarginalium a costa ad angulum analem extendente ; 
posticis dimidio basali lateritio-fulvo, margine exteriore irregulari, dimidio apicali nigro, angulo anali 
punctis duabus minutis et serie submarginali flavis notato. 
Hab. Panama (fibbe), Lion Hill (M‘Leannan!, Mus. Vindob.). 
