8 RHOPALOCERA. 
O. theoni similis, sed alis anticis nigricantioribus fasciis in dimidio apicali clarioribus, stria vena mediane fere 
obsoleta ; posticis medialiter rufescentioribus, fascia mediana irregulariter hyalina: subtus maculis posti- 
carum costalibus duabus albis. 
Hab. Costa Rica (Van Patten*), Irazu (Rogers); Panama, Chiriqui (Arcé).—CoLomBIa 
(Mus. Brit.*). 
The original specimen, now in the British Museum, described and figured by Mr. 
Butler, is said to have been obtained in Colombia. This example has a semitrans- 
lucent patch on the secondary wings, which is hardly shown in our Central-American 
examples. These, on the other hand, have indications of a fulvous streak along 
the region of the median nervure of the primaries not observable in the original 
O. montagui; on the underside there is a single large white spot near the costal 
margin of the secondary wings a little beyond the cell. 
8. Olyras insignis. (Tab. I. fig. 1.) 
Olyras insignis, Salv. Ann. & Mag. Nat. Hist. ser. 4, iv. p. 163°; Butl. & Druce, P. Z. 8S. 1874, 
p. 331’. 
Alis anticis nigris, maculis duabus discalibus, duabus elongatis angulum analem versus et apicibus interne 
(venis divisis) flavo-hyalinis ; posticis flavo-hyalinis nigro late marginatis, margine nigro angulum analem 
versus rufo notato: subtus margine externo albo-punctato, macula unica costali alba. 
Hab. Costa Rica (Van Patten”); Panama, Calobre (Arcé'). 
This well-marked species differs from all its congeners, except, perhaps, O. trans- 
lucens of Ecuador, in having the intervals between the dark markings of the wings 
transparent, with only a tinge of yellow suffused over them. It was originally 
described from a single specimen obtained near Calobre in the State of Panama; but 
other specimens have since been secured. It appears to be more abundant in Costa 
Rica. Our figure represents the type specimen. 
EUTRESIS. 
Eutresis, Doubleday, Gen. Diurn. Lep. i. p. 111 (1847). 
Femur of front leg longer than coxa; tibia and tarsus together longer than femur ; 
subcostal pencil of hair of secondaries in a single patch; costa of secondaries uniformly 
curved; middle discocellular straight; recurrent nervule emitted from lower discocellular 
near the origin of the lower radial. 
This small genus, comprising four species, has much the same range as Olyras, but 
in Central America does not spread north of Costa Rica. Of the species in South 
America, one, the type (E. hyperia), is confined to Venezuela; a second, &. hyspa, is 
