il2 Explanation of Plates. 



Explanation of Plate XVII. 



The offspring of a trophoniiis form of Pajyilio dardaniis, sub-sp. 

 cenea, observed laying eggs on May 4, 1904, at Bellair, five miles 

 from Durban, Natal. The observation was made and tlie eggs 

 collected by Mr. G. F. Leigh, but the female parent escaped. The 

 figures represent eleven out of the thirteen offspring bred by Mr. 

 Leigh from these eggs at Durlmn. The specimens are in the Hope 

 Dei)artment, Oxford University Museum. 



All the figures are about | of the natural size. 



Fig. L Male offspring : pupated July 4, 1904 ; emerged August 5. 

 The 10th to emerge. Li this specimen the submarginal 

 black band of the hind-wing is the least develo2)ed. 

 There is however a slight trace of a narrow "sickle" 

 partially closing the costal gap. 



2. Male offspring : pupated June 20, 1904 ; emerged July 31. 



The 8th to emerge. The costal gap closed by a narrow 

 " sickle." 



3. Male offspring : pupated June 14, 1904 ; emerged July 25. 



The 5tli to emerge. Although the costal gap is open 

 there are traces of a black mark partially closing the 

 inner gap. 



4. Male offspring : pupated June 12, 1904 ; emerged July 18. 



The 4th to emerge. Very similar to Fig. 3, but the 

 costal gap is here completely closed. 



In this figure and the two succeeding it is seen that 

 the inner border of the black margin of the fore-wing 

 is distinctly serrated, recalling the appearance of meriones. 



5. Male offspring : pupated June 10, 1904 ; emerged July 5. 



The 2nd to emerge. Submarginal Ijand of hind-wing 

 slightly more developed, and tlie gaps slightly less than 

 in Fig. 4. 



The oneriones-like serration described under Fig. 4 here 

 reaches its maximum development. 



6. Male offspring : pupated June 16, 1904 ; emerged July 27. 



The 6th to emerge. Hind-wing far more heasily marked 

 than in any other of the male offspring, both gaps being 

 completely closed. These males, emerging in July and 

 August 1904, are as a whole far less heavily marked than 

 those bred in November 1902 and November 1903, by 

 Mr. G. F. Leigh. 



