688 Mr. G. F. Leigh on Synepigonic series of 
Cenea (true). : : , : : : 50 
»  (white- ube) < : ; 40 
Grades between cenea (white- sunt ana hi ‘ppo- 
coonoides : - 4 
Hippocoonoides . : 3 : 2 
Grades between Tine econtaties oe trophonins . 3 
Trophonius 1 
100 
“Tn this matter the preponderance of cenca 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. dominicanus nor A. ochlea being 
at all prevalent even on the Natal coast, and not extending 
further South. But the rarity of trophonius is not easy 
to account for, if D. chrysippus is its model; the latter bemg 
numerous and generally distributed. It seems possible that 
trophonius was originally modified in mimicry of Aletis 
helcita in West Africa (the Abyssinian extremely rare 
ruspine® 2 of Pap. antinori lends support to this view) ; 
but, curiously enough, ¢vophonius 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 
trophonius was in Hobley’s KE. African collection; it was 
of the West African character, but in several marked 
features much more like D. chrysippus than like <Aletis 
helcita.” 
“March 19, 1904. 
“Tt is most difficult to believe that such close mimickers 
as the second and third females of antinorti, the plane- 
moitdes 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 owght to be no rarer 
than the Aippocoon female of merope, or the cenea female 
of cenea. 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 
this interesting and puzzling group of Papilios. EK. B. P. 
* See p. 678. 
