PLATE II. Illustration of mimicry in butterflies. _p._ 30. Fig. 1. Male of _Papilio merope_. Fig. 2. Female of ditto mimicking Fig. 3. Fig. 3. _Danais niavius._ On the African continent both species occur, but in Madagascar _D. niavius_ is wanting, and the female _P. merope_ is coloured like the male. PLATE III. Fig. 1. _Gonepteryx Cleopatra._ _p._ 40. Fig. 2. _Gonepteryx rhamni_, male. _Note._--The orange spot in Fig. 2 has spread over the wing in Fig. 1. Fig. 3. _Vanessa Antiopa._ Fig. 4. _Panopoea hirta._ Fig. 5. _Acrea gea._ These two last belong to widely different genera, but are admirable examples of mimicry. PLATE IV. Fig. 1. _Leucophasia Sinapis._ _p._ 42. Fig. 2. Ditto, var. _diniensis_. Fig. 3. _Anthocaris cardamines_, male. Fig. 4. Ditto, female. Fig. 5. _Anthocaris belemia._ Fig. 6. _Anthocaris belia._ Fig. 7. Ditto, var. _simplonia_. Fig. 8. _Anthocaris eupheno_, female. Fig. 9. Ditto, male. Fig. 10. _Anthocaris euphemoides._ Fig. 11. _Papilio machaon._ Fig. 12. _Papilio podalirius._ Fig. 13. _Pieris napi_, summer form. Fig. 14. Ditto, winter form. Fig. 15. Ditto, var. _bryoniæ_ (alpine form). Fig. 16. Ditto, summer form, underside. Fig. 17. Ditto, winter form, underside. Fig. 18. Ditto, var. _bryoniæ_, underside. Figs. 13-18 illustrate admirably the variations of the yellow and black in the same species. PLATE V. Fig. 1. _Araschnia prorsa_, male. _p._ 44. Fig. 2. Ditto, female. Fig. 3. _Araschnia levana_, female. Fig. 4. Ditto, male. Fig. 5. _Paragra ægeria._ Fig. 6. _Araschnia porima._ Fig. 7. Ditto, var. _meione_. Fig. 8. _Grapta interrogationis._ Fig. 9. Ditto. Fig. 10. Ditto. Fig. 11. _Papilio Ajax_, var. _Walshii_. Fig. 12. Ditto, var. _telamonides_. Fig. 13. Ditto, var. _Marcellus_.