Heredity in six families of Fcqjilio dardanus. 431 



taken into account, may be accepted as approximately cor- 

 rect. The numbers of Papilio dardanus (of wliich nearly all 

 the Chirinda males possess the heavy black hind-wing band 

 of the E. subspecies, tibullus, Kirby, are as follows : — 



Males 24 



Females 



Hippocoon, f. . . . .22 



Ccnca, f. . . . . .1 



Trojihonius, f. . . . .1 



Troplionius, mimicking Z>. clirysippus, is thus rare, as it is 

 in Natal ; but, as regards the other two female forms, the 

 proportions are reversed, hippocoon being predominant and 

 cenea rare. It will be of the highest interest to breed 

 from these female forms at Chirinda. There can be little 

 doubt that it would be found that hippocoon here pre- 

 dominates among the female offspring of a female parent 

 of any form, just as cenea predominates in Natal. 



When we investigate the proportions of the Danaine 

 models at Chirinda we do not tind that predominance of 

 the black and white species of Amauris which is suggested 

 by the numbers of the hij)pocoon mimetic form. The 

 following results have been so far obtained, but a small 

 part of the collection still remains unexamined : — 



The model of hippocoon — Amauris niavius, L., subsp. 



dominicanus. Trim. ...... 66 



mi IIP i Amauris lohenqula, E. M. Sharpe 198 



The models oi cenea \ 71 • i\ -d t.^ n eo 



I „ awtmacidata, Isutler . 152 



The model of trophonius — Danaida chrysippius, L. . 109 



Amauris lolengula represents, and is probably a local 

 form of, A. echeria, Boisd., which is still unknown at 

 Chirinda. It is equally serviceable as a model for cenea. 

 In addition to dominicamcs, 22 specimens of the smaller 

 black and white Amauris ochlea, Boisd., were counted ; 

 but the difference in the pattern is so great that it is un- 

 likely that the influence upon hippocoon is greatly affected. 

 Neglecting ochlea, the numbers of the Danaine model 

 of hippocoon are less than one-fifth of those of the two 

 models of cenea. Yet this small proportion is accompanied 

 by the immense preponderance of hippocoon revealed in 

 the figures quoted above. As bearing upon these inter- 

 esting and, in view of the effect produced, remark- 

 able proportions, Mr. Svvynnerton tells me that lohengula 



