Explanation of Plate XXIV. 



Tlie female parent {cenea female form of Papilio dardanus, subsp. 

 cenea) together with one-third of the males and the whole of the 

 female offspring (except one greatly deformed cenea) bred from it by 

 Mr. G. F. Leigh, at Durban. 



All the figures are about f of the natural size. 



Figs. 



1. The female parent, captured Jan. 14, 1907, and laid 42 eggs 



Jan. 15 and 16. The spots (l)-(4) round the end of the 

 fore-wing cell are well developed. The chief spot is pale 

 ochreous, the others white. The spot (5) in the cell is divided 

 into two. The hereditary transmission of these and other 

 characters of the parent described on p. 438, may be traced in 

 the cenea offspring Figs. 7-21. 

 The male offspring are shown in Figs. 2-6. 



2. The example in which the submarginal black band of the hind- 



wing is least developed. 



3. The example which follows Fig. 2 when the specimens are 



arranged in the order of the increasing heaviness of the black 

 band. 



4. After Fig. 3 succeed two unfigured specimens and then the 



example here represented. 



5. An unfigured example follows Fig. 4, and then the specimen 



here shown, which is succeeded by seven unfigured males. 



6. The seven specimens above referred to are followed by the male 



here represented, — the individual in which the band is blackest 

 The female offspring of the cenea form are shown in Figs. 7-21. 

 These are fully described in the order of the figures on 

 pages 440, 441. 

 7^13. The specimens shown in these seven figures possess the 

 normal number of spots (l)-(4) in the fore-wing, resembling 

 the parent in this respect, although in some of them the spots 

 are smaller. The fore-wing spots in the specimen shown in 

 Fig. 9 are more ochreous than in any other, the remaining 

 14 cenea offspring being in this respect nearly in the condition 

 of the parent. 



