692 Explanation of Plates. 



Explanation of Plate XXXI. 



All the figures are represented slightly more than half the natural 

 size. 



Two Synepigonic Groups of Papilio cenea together with their 

 parents — a cenea form and a trophonius form respectively. 

 Fig. 1. The female parent of the 1902 group, captured in copidd 

 with the male represented in Fig. 2. The butterfly 

 represented in Fig. 1 is a typical white-spotted Natal 

 cenea form. A selection of the female offspring is shown 

 in Figs. 3-8. 



2. The male parent. The prominent black band of the hind- 



wing is rather less heavily marked than is usual in 

 Southern forms. This feature was inherited by the male 

 oft'spring. 



3. Female offspring of the cenea, form described as III. in this 



memoir. A white-spotted Natal form showing some 

 transition towards the buff-spotted variety. 



4. Female offspring of the cenea form, described as V. Rather 



more transitional towards the buff-spotted form than III. 



5. Dwarfed female offspring of the ce7iea form, described as 



IV. Intermediate between the females represented in 

 Figs. 3 and 4. 



6. Much-dwarfed female offspring of the cenea form, described 



as VI. The specimen represented is nearest to the 

 typical buff-spotted Southern form of female cenea. 

 7 & 8. Two female offspring of the hippocoonoides form. Both 

 typical except for their stunted size, especially marked 

 in Fig. 7. 

 9. The female parent of the 1903 Synepigonic group captured 

 near Durban on Sept. 18, 1903. It is seen to be a 

 typical trophonius form. From this female seven eggs 

 were obtained, yielding the five imagines represented in 

 Figs. 10-14. 



10. Female offspring of the cenea form : a white-spotted variety 



similar to the female described as II. in the 1902 family. 

 The chief spot (1) of the fore-wing is unusually small. 



11. Female offspring of the cenea form : a typical white-spotted 



variety similar to I. of the 1902 family. 

 12-14. The male offspring. 



