_PEROPHTHALMA. 451 
M. C. Oberthiir tells us that the species described by Boisduval as Nelone praxithea 
is identical with the Colombian insect called Amarynthis hypochalybe by Dr. Felder. 
Boisduval is the only authority we have for including it in our fauna. 
PEROPHTHALMA. 
Perophthalma, Westwood, Gen. Diurn. Lep. p. 455 (section ** of Mesosemia). 
Mesosemia tenera has usually been considered an aberrant form of Mesosema, but 
the characters of the venation of the primaries differ so positively that its generic sepa- 
- ration seems demanded. 
As already stated, Mesosemia has four branches to the subcostal nervure to the 
primaries, two before and two beyond the end of the cell; the upper radial and the 
middle discocellular leave the subcostal at the same point, so that there is no upper 
discocellular. In Perophthalma the subcostal emits only three branches, two before 
and one beyond the end of the cell; the middle discocellular joins the upper radial 
some way beyond the junction of the latter with the subcostal, so that there is a well- 
defined upper discocellular. These points make it necessary that Perophthalma should 
be removed altogether from the neighbourhood of Mesosemia. Its position here, how- 
ever, must be considered provisional. 
The front legs of the male have a very long coxa, the trochanter joint being placed 
at about two thirds from the base; the femur is exceedingly short but thick< 3 coxal 
projection ; tibia> femur +trochanter, tarsus= tibia. 
The male secondary organs are very like those of Mesosemia grandis, but inside the 
cavity of the penis is a row of serrate papille. 
1. Perophthalma tenera. 
Mesosemia tenera, Westw. Gen. Diurn. Lep. p. 455'; Hew. Ex. Butt., Mesosemia, t. 3. f. 197; 
Bates, Journ. Linn. Soc. Zool. ix. p. 419°. 
Alis pallide fuscis, anticis fascia transversa per cellulam ad marginem internum extensa albida; ocello ad cellule 
finem nigro, albo bipupillato et fulvo ciliato ; striis undulatis pallidis submarginalibus ; posticis area discali 
ochracea, striis undulatis pallidis submarginalibus ; subtus ut supra sed alis paullo dilutioribus. 
@ mari similis. , 
Hab. Guarewata, Choctum (Hague), Cubilguitz, Cahabon, San Isidro, Zapotes, 
Mirandilla (Champion) ; Honpuras!; Nicaragua, Chontales (Belt); Costa Rica, Irazu 
(Rogers); Panama, Volcan de Chiriqui, Bugaba, David (Champion), Calobre (Arcé).— 
CoLoMBIA; VENEZUELA 13; EcuaDor; AMAZONS 13; GuIANA; Braziv?. 
There appear to be two forms of this insect, which seem to blend together insensibly. 
The prevalent form throughout our region has a white band across the primaries. In 
South America this is much less perceptible. But of this southern form we have 
examples from Nicaragua and the State of Panama. 
3M 2 
