Heredity in six families of Papilio dardrmus. 431 



taken into account, may be accepted as approximately cor- 

 rect. The numbers of Fainlio dardanus (ot which nearly all 

 the Chirinda males possess the heavy black hind-wing band 

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



Males 24 



Females 



Hii^pocoon, f. . . . .22 



Ccnea, f. . . . . .1 



Trojphonius, f. . . , .1 



TrnpJionius, mimicking i). chrysippus, 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 hipjjocoon 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 find that predominance of 

 the black and white species of Amauris which is suggested 

 by the numbers of the liip)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. 



dominicamis, Trim. ...... 66 



The models of ceneai'^''"'''''' hlmcjnla E. M. Sharpe 198 



I. „ cabimaciUata, liutler . lo2 



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



Amauris lohengula 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 dominicanus, 22 specimens of the smaller 

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

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

 likely that the influence upon hipipocoon 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. Swynnerton tells me that Wbengula 



