Explanation of Plates. 313 
Fia. 7. Female offspring, trophonius form: pupated July 6, 1904 ; 
emerged August 26. The 13th to emerge. <A typical 
example of the southern form of trophonius, here for the 
first time bred from a trophonius female parent. 
8. Female offspring, cenea form: pupated June 12, 1904 ; 
emerged July 17. The 3rd to emerge. The discal patch 
on the hind-wing is distinctly browner than usual,—a 
result of trophonius parentage appearing in an otherwise 
typical cenea ? form. 
9. Female offspring, cenea form: pupated June 22, 1904 ; 
emerged July 29. The 7th to emerge. 
10. Female offspring, cenea form: pupated July 8, 1904; 
emerged August 24. The 11th to emerge. The right- 
hand wings, being somewhat crippled, are only partially 
shown in the figure. 
11. Female offspring, cenea form: pupated June 11, 1904; 
emerged July 4. The Ist to emerge. The shape of the 
principal spot of the fore-wing, and the development of 
a light patch on its inner margin, as well as the evident 
tendency of the two markings to fuse, show a distinct 
influence of the trophonius parentage. 
EXPLANATION OF PLATE XVIII. 
Female forms of Papilio dardanus. 
All the figures are about the natural size. The butterflies were 
intended to be precisely of the natural size, but as a matter of fact 
they are all slightly enlarged. Furthermore, probably in consequence 
of the concurrence of minute errors, the figures on the right side, 
3 and 4, are rather more magnified than those on the left, 1 and 2. 
The error is well within the limits of individual variation. 
Fie. 1. Papilio durdanus, sub-sp. polytrophus, Q f. trimeni, n. f. 
* Kikuyu Escarpment, British East Africa, 6500-9000 feet. 
W. Doherty, October—November 1900: in the Hope 
Department, Oxford University Museum. The specimen 
shows distinct rudimentary “tails” to the hind-wing. 
The pale tints are yellow and not white, while the 
pattern is also very ancestral as compared with the 
hippocoow form from the same locality (Fig. 2). 
