Fig. 1. Male _Araschnia Levana_, winter form.
Fig. 2. Female _A. Levana_, winter form.
Fig. 3. Male _A. Levana_, artificially bred intermediate form
(so-called _Porima_).
Fig. 4. Female _A. Levana_, intermediate form (_Porima_), artificially
bred from the summer generation, agreeing perfectly in marking with
the winter form, and only to be distinguished from it by the somewhat
darker ground colour.
Fig. 5. Male _A. Levana_, summer form (_Prorsa_).
Fig. 6. Female _A. Levana_, summer form (_Prorsa_).
Figs. 7 to 9. Intermediate forms (_Porima_), artificially bred from the
first summer generation.
Figs. 10 and 11. Male and female _Pieris Napi_, winter form,
artificially bred from the summer generation; the yellow ground-colour
of the underside of the hind wings brighter than in the natural winter
form.
Figs. 12 and 13. Male and female _Pieris Napi_, summer form.
Figs. 14 and 15. _Pieris Napi_, var. _Bryoniæ_, male and female reared
from eggs.