LEPIDOPTERA. — RHOPALOCERA. 341 
Myrina to the middle of the antenne ; the third joint either naked 
or covered with minute scales; the antenne gradually clavate, or 
with a thickened compressed club abruptly inflected or bent out- 
wards ; the feet are slender, the anterior pair never spurious, perfect, 
and alike in both sexes ; the hinder wings entire, or tailed ; the body 
small, slender, and compressed ; and the proboscis short, or moderately 
‘long. 
This stirps comprises the normal genera Petavia (nearly related to 
the Hesperiidae, and forming the transition from the Anopluriform to 
the Vermiform stirpes), Polyommatus, Lyczna, Thecla, and Myrina; 
aberrant genus, Symetha. 
In the CurLroGNATHIFoRM or IuLiForM stirps, the darve (which 
are considered as typical of the whole of the order Lepidoptera) are 
long and cylindrical, attenuated at both ends, and transversely striated 
as in Colias (at the confines of the Vermiform stirps, thus determin- 
ing the natural situation of this genus), or regularly cylindrical and 
slightly hairy, as in Pieris and Pontia, or distended about the fourth 
or fifth segment of the body, and tapering gradually towards the tail, 
and more abruptly to the head in the typical group, the true Papi- 
liones, acquiring tubercles, which in the remote genera increase in 
length, and show the gradual transition, through Euplcea and Heli- 
conia *, to the Chilopodiform stirps which succeeds; the head is at- 
tached to the body by a very small articulation, and appears, when 
exserted, separated from it ; behind it is a bifid fleshy organ or furcula. 
The pupa is attached, as in the preceding stirps, but it has peculi- 
arities of greater perfection: it is naked and angulated, terminated 
in the typical forms at the upper extremity by two processes, in those 
near the Vermiform stirps by one short process alone ; those approach- 
ing the next stirps have the suspension of that group. The imago is 
considered by Dr. Horsfield as the perfection of the whole order, the 
stirps comprehending as it does the Papiliones Equites and Danai of 
Linneus, and his Heliconii standing at the immediate confines in 
the succeeding group: their wings also (according to Jones in Linn. 
Trans.) being more perfectly nerved +, the palpi in the typical species 
* The analogy between the larva of Heliconia and Craspedesoma, which is 
intermediate between the Chilopoda and Chilognatha (see Hore Ent. p. 351.), deter- 
mines the situation of the former genus in the Lepidopterous circle between the 
Chilopodiform and Chilognathiform stirpes. 
t+ Ima preceding page Dr. Horsfield expressed the opinion that Iulus was the 
z 3 
