LEPIDOPTERA. — HELICONIIDE. 351 
period of the appearance, food, &c. of the different supposed species; 
and the subject has been and still continues to be discussed. (See 
Illustr. Haustell. vol. i. p. 17—24. 146.; Curtis, the Naturalist’s 
Library ; and various papers in the Mag. of Nat. Hist. by the Rev. 
W. T. Bree, vol. iii. p.242.; Rennie, No. 8.) 
Fig. 99.1, 2, 3. (copied from Herold) represents the egg of Pontia 
Brassicee, the young caterpillar in the position in which it is en- 
closed in the egg, and the same in the act of bursting forth from the 
egg, the covering of which is subsequently devoured by it. 
Pieris Cratzgi, the black-veined white, although so abundant and 
destructive on the Continent, as to have been called by Linnzus the 
pest of gardens, is of considerable rarity in this country. According 
to Godart its larva live in society under a silken web, in which they 
form small cases to secure themselves against the winter, and which 
they only quit at the arrival of spring, returning to it at night. 
The males in the genus Colias exhibit a character overlooked by 
entomologists, which serves well to distinguish the species. It isa 
kind of glandular sac placed upon the anterior edge of the hind wings 
near their base. It is large in C. Edusa, small and lenticular in C. 
Myrmedone, and wanting in C. Hyale and Chrysothome, &c. (Ann. 
Soc. Ent. de France, 1836, p. xi.) 
M. Rambur has published an account with figures of the transform- 
ations of the Spanish Pontia Eupheme (forming his genus Zegris), 
which differs from all the rest of this subfamily, and approaches the 
Dorites in having the chrysalis enclosed in a “ réseau de soie assez 
fort.” (Ann. Soc. Ent. de France, 1836, p. 576.) 
The larva of the Indian Pontia Belisama (Horsf. Zep. Jav. pl. 4. 
f.10.) is clothed with long slender hairs, thus differing from the rest 
of the family. 
The second family, HELtconi1p#, including Boisduval’s two tribes 
Danaides and Heliconides (fig. 97.6. Heliconia Lycoides Bdv.), is 
distinguished from the former by the small size of the fore legs 
(fg. 97.3. fore leg $4.2 of Eupleea Plexippus Zinn.), and from the 
following by the fore tarsi being articulated in the typical species. 
The tarsal ungues are large, entire or bifid, and with a long and 
generally bifid appendage on each side (fig. 97. 5. ungues of hind 
feet of Euploea Plexippus ; 97.11. ditto of Heliconia Callicopis). The 
