EXPLANATION OF THE PLATES. 



PLATE I. 



Fig. i. 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 y 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 1 1. 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, sum- 

 mer form. 



Figs. 14 and 15. Pieris Napi, var. Bryonice, male and 

 female reared from eggs. 



PLATE IJ. 



Fig. 1 6. Papilio Ajax, var. Telamonides, winter form. 

 Fig. 17. P. Ajax, van Marcellus> summer form. 



