688 Mr. G. F. Leigh on Synepigonic series of 



Cenea (true) 50 



„ (wliite-spotted) 40 



Grades between cejzea (white-spotted) and hii^po- 



coonoides ........ 4 



Hippocoonoides ........ 2 



Grades between htppocoonoides and trophonius . . 3 



Trophonius 1 



100 



" In this matter the preponderance of cenea proper in its 

 two forms is to be expected, because its model Am. echeria 

 in two forms is practically the only Amauris found in 

 South Africa — neither A. dominie anus nor A. ochlea being 

 at all prevalent even on the Natal coast, and not extending 

 further South. But the rarity of troj^honius is not easy 

 to account for, HD. chrysi2J2^ns is its model ; the latter being 

 numerous and generally distributed. It seems possible that 

 tro'plionius was originally modified in mimicry of Aletis 

 helcita in West Africa (the Abyssinian extremely rare 

 ruspinfe $ of Pap. antinorii lends support to this view) ; 

 but, curiously enough, trophonius appears to be decidedly 

 rare on the W. Coast as well as in other parts of Equatorial 

 Africa, where Aletis is abundant. A single very fine 

 trophonitis was in Hobley's E. African collection ; it was 

 of the West African character, but in several marked 

 features much more like D. chrysijJj^us than like Aletis 

 helcita." 



" March 19, 1904. 



" It is most difficult to believe that such close mimickers 

 as the second and third females of antinorii, the planc- 

 mo'idcs female of merope, or even (in a less degree) the 

 trophonius female of cenea, can be as rare as they seem 

 to be. Such admirable mimickers ought to be no rarer 

 than the hippocoon female of merope, or the cenea female 

 of cenect. It must be remembered that all the females of 

 the group in continental Africa seem to be much rarer than 

 the males, yet in the few cases of breeding P. cenea — on a 

 very limited scale — there seems to have been no marked 

 disparity in the number of the sexes." * 



Mr. Trimen has kindly contributed an Appendix (see 

 p. 691), setting forth the characters and arrangement of 

 tliis interesting and puzzling group of Papilios. E. B. P. 



* See p. 678. 



