144 RHOPALOCERA. 
of the different parts; but at the same time specific peculiarities exist. The tegumen 
has, on the ventral surface inside the cavity, a piece like an inverted stirrup, which is 
pointed at the end and directed outwards; the harpagones have a strong bar along the 
lower edge; and this seems to be joined to the tegumen by a continuous membrane, the 
folds of which give rise to much confusion by obscuring the outlines of the whole 
structure. On the harpagones there are no dentations; but they terminate in a blunt 
end. The penis, in every species examined, is very short. 
As the proportion of the joints of the front leg of the male H. erato differs from that 
of other members of the genus here treated of, we use this character to separate this 
species from the rest. Our other divisions rest on the colour-patern of the wings 
alone. 
a, Femur of front legs of the male slender, longer than the coxa; tibia and tarsus 
also slender ; body usually elongated, projecting beyond the anal angle of the 
secondaries. 
a’. Wings ferruginous or tawny, with black margins and black transverse marks on one 
or both wings; or extremity of primaries black, with yellow or white spots. 
1. Heliconius melicerta. (Tab. XVI. figg. 12, 13.) 
Heliconius melicerta, Bates, Ent. Monthl. Mag. iii. p. 87}. 
Alis supra ferrugineis, anticis costa, macula discali, altera ad cellule finem, area apicali tota et margine posti- 
carum late nigris; anticis plaga magna, extus valde sinuata ad cellule finem a costa ad angulum analem 
extensa; serie macularum subapicali, una inter ramos medianos secundum et tertium, duabus ad angulum 
analem et duabus angulum posticarum apicalem versus lete flavis ; subtus et supra posticis maculis sub- 
marginalibus et duabus ad angulum apicalem albis; antennis flavis, ad basin nigris. 
Hab. Panama, Lion-Hill station (d/‘Leannan 1).—Cotomsta 1. 
A species allied to the well-known JH. sylvanus (Cr.), of Guiana, but differs in many 
particulars, fully described by Mr. Bates!. It is a larger species, with broader 
primaries; the yellow patch at the end of the cell nearly absorbs the macular band 
beyond the cell, leaving only some black spots within its area. 
Two specimens only, strictly referable to this species, have reached us from Panama, 
one of which (the type) is figured; but we have a good series from Colombia, where it 
occurs not only at Frontino in the Cauca valley, but also near San Buenaventura, on 
the west coast. Some little variation is to be traced in these, as might be expected ; 
this chiefly affects the large median yellow spot of the primaries, which in some cases 
encroaches more on the apex of the wing than in others. 
2. Heliconius albucilla. (Tab. XVI. figg. 7, 8, and fig, 9, var.) 
Heliconius albucilla, Bates, Ent. Monthl. Mag. iii, p. 887. 
