SYNCHLOE.—ERESIA. 183 
S. bonplandi is not uncommon in the State of Panama and in Costa Rica, but seems 
restricted to the low-lying districts. 
A male, from Lion Hill, is figured. 
ERESIA. 
Eresia, Boisduval, Sp. Gén. t. 7 B. f. 8 (1836) ; Doubl. Gen. Diurn. Lep. p. 182. 
The species now usually associated in this genus have elongated primary wings; and 
in some the pattern of the colour of these wings is very different in the two sexes. 
These points are most strongly shown in LE. eranitis, E. alcina, and the allied species: 
they are not, however, universally present; and the line of demarcation between 
Eresia and Phyciodes is nearly broken down by such species as E. myta and E. ofeila. 
Then, again, there is a large section of the genus, the members of which mimic the 
colour and the shape of the wings of other Butterflies. Thus several South-American 
species take the pattern of corresponding species of Actinote; others are like Heliconius 
or Mechanitis on a small scale; others, again, resemble Colenis and even Callicore and 
Threnodes (Erycinide). We thus have a very mixed assemblage of insects, the relation- 
ship of which is somewhat obscure; and future researches may tend either to their 
further separation or to the transference of some species to the genus Phyciodes, itself 
one of some complexity. So far as the Central-American species are concerned, the 
character of the elongated primaries seems the best indication of the genus as 
distinguished from Phyciodes. 
The antenne of LH. alsina have thirty-seven joints, the terminal fourteen forming 
a rather abrupt club. The terminal joint of the palpi is rather more attenuated than 
in Melitea, but not quite so much so as in typical Phyciodes; the middle joint is 
rather swollen towards the distal end. The front legs of the male are slightly hairy ; 
the coxa stout, < femur + trochanter; tibia < femur, tarsus (single-jointed) = 4 tibia. 
The claws of the other legs are much curved, and the tibia not spiny on the outer 
surface. The first subcostal branch of the primaries is thrown off before the end of 
the cell, the second after it, as in all these closely allied genera. 
Eresia, as we understand it, contains between fifty and sixty species, which are 
widely distributed over tropical South America. Of these, thirteen are found within 
our limits. 
a. Wings more or less elongated and coloured fulvous and black. 
a’. Sexes nearly alike. 
1. Eresia mechanitis. (Tab. XX. figg. 13, 14.) 
Eresia mechanitis, Godm. & Salv. P. Z. 8. 1878, p. 269°. 
Eresia eunice, Butl. & Druce P. Z. 8. 1874, p. 350’. 
Alis fusco-nigris, anticis fascia curvata (in regione vene mediane bifurcata) a basi ad angulum analem fulva, 
apice fasciis duabus flavicantioribus transvittata; posticis area interna fulva fascia transversa nigra 
