270 RHOPALOCERA. 
4, Ageronia lelaps, sp. nov. 
9 A. atlanti affinis et ocellis posticarum eodem modo ceruleo pupillatis, alis omnibus supra fuscescentioribus 
viridi haud tinctis, anticis lituris indistinctis duabus haud una transfasciatis. 
do adhuc ignotus. 
Hab. Mexico, Ventanas (Forrer). 
A single female specimen of this Ageronia was captured by Mr. Forrer at Ventanas 
in the State of Durango, Mexico, at an altitude of about 3000 feet above the sea. It 
differs from A. atlantis in its upper surface being browner, the apical band being dusky 
instead of white, and having the indications of a second band within. The ocelli are 
smaller, the blue pupils are obsolete on the upper surface, but are plainly visible 
beneath. Our single specimen is not in very good condition, and we look anxiously 
forward for more perfect examples, including the male. 
PERIDROMIA. 
Peridromia, Boisduval, Sp. Gen. t. 23. f. 5 (1858). 
Ageronia, part., Hiibner et auctt. 
In this genus we propose to place the species of Ageronia which have in the male 
the first two branches of the subcostal nervure anchylosed in a common origin from the 
subcostal, and in which the lower discocellular has a double curve and meets the median 
halfway between the first and second branches. In the female the neuration is much 
more like that of both sexes of Ageronia; the first and second subcostal branches have 
each a separate origin, and the lower discocellular joins the median nearer to, if not 
actually at, the origin of the second branch. In other respects the two groups are very 
similar; the femur, tibia, and tarsus are, perhaps, more slender in Peridromia than in 
Ageronia, but the difference is not great ; the lower radial too of the primaries is not 
so straight. | 
There are thirteen species known of Peridromia, the focus of the genus being the 
valley of the Amazons. In Central America we find seven species, all of which, with the 
exception of P. guatemalena, are also found in South America. 
a. Sexes differently coloured; underside of wings black. 
1. Peridromia arethusa. 
Papilio arethusa, Cr. Pap. Ex. i. t. 77. ff. H, F°. 
Ageronia arethusa, Doubl. Gen. Diurn. Lep. p. 83°; Bates, Journ. Ent. i. p. 314°. 
Papilio laodamia, Cr. Pap. Ex. ii. t. 180. f. A. 
Peridromia arete, Luc. Rev. Zool. 1853, p. 310° (nec Doubl.) ; Boisd. Lep. Guat. p. 27°. 
Alis velutino-cyaneo-nigris, maculis cyaneis precipue ad costam et marginem externum anticarum et margines 
externum et interiorem posticarum notatis; subtus nigris, posticis punctis ad basin tribus aliisque ad mar- 
ginem interiorem et externum coccineis ornatis. 
§ mari similis, sed punctis cyaneis crebrioribus, anticis fascia alba bisectis ; subtus maculis coccineis majoribus. 
