LEPIDOPTERA. 179 
tory in both sexes, and sometimes in the males only. The chrysalis 
is simply suspended vertically by the posterior extremity. 
Sometimes the anterior legs, though folded and smaller than the 
others, differ from them but little. The inferior wings, of which 
the central cell is always closed posteriorly, but slightly clasp the 
abdomen in most of them. The inferior palpi are distant, slender, 
cylindrical, and generally very short. All the subgenera of this sub- 
division are foreign to Europe. 
We distinguish the Danaides—Danats; Euploea, Fab.; part of the 
P. danai festivi, L.—by their triangular wings and their antennz 
terminated by a kind of elongated and curved button(1); the Idex— 
Inga, Fab.—by their almost oval and elongated wings, and nearly 
filiform antennx(2). In these two subgenera the inferior palpi hardly 
reach above the clypeus, and their second joint is scarcely twice as 
long as the first. 
In the two following subgenera where the wings resemble those of 
the preceding subgenus, but are usually narrower and more elongated, 
and where the abdomen is also proportionally longer than that of 
most of the preceding ones, that joint is much longer than the first 
and its extremity evidently extends beyond the clypeus. In the Heli- 
conii—Henicontus, Lat.; Mechanitis, Fab.; P. pelicontt, Lin.—the an- 
tennz are twice the length of the head and thorax, and insensibly 
enlarged towards the extremity(3). Those of the Acree—Acrza, 
Fab.—are shortly and abruptly globuliform(4). 
Sometimes—P. nymphalis, L..—the two anterior legs are strongly 
folded, either apparent and very hairy, or small and concealed. The 
inferior wings, of which the central cell is open in several, evidently 
embrace the abdomen beneath. The inferior palpi are proportion- 
ally longer and frequently thicker and more approximated. 
Here, the central cell of the inferior wings is open. 
Those in which the inferior palpi are but slightly compressed, 
distant throughout their length, or at least at their extremity, and 
abruptly terminated by a slender and acicular joints; where the under 
surface of the wings frequently presents silvery or yellow spots ona 
fulvous ground; and the caterpillars of which are always covered 
(1) Lat., Gener. Crust. et Insect., IV, 201; Encyc. Méthod., Insect. IX, article 
Papilion, genus Dana‘de. 
(2) Lat., Ibid., Idem; Encyc. Méthod., Ibid., genus Jdea. 
(3) Lat., Gener. Crust. et Insect., IV, 201; Encyc. Méthod., article Papilion, 
genus Héliconie. 
(4) Lat. Ibid., fdem.; Encyc. Méthod., Ibid., genus Aerée. 
