¢ le” ) 
accounted as belonging to the same mimetic association. 
But although I can bring forward a few instances of this 
nature, they remain few, isolated and insignificant. They 
may, in my judgment, be confidently reckoned as some of the 
exceptions which prove, or test, the rule. 
Prof. Poutton and Dr. Jorpawn both concurred as to the 
meaning to be assigned to the instances cited by Dr. Dixry. 
PAPILIO DARDANUS, BROWN, BRED IN S.E. RHODESIA BY 
Mr. C. F. M. Swynnerron.—Prof. Pouuron read the following 
extract from a letter written from Chirinda, 8.E. Rhodesia, 
Aug. 28, 1913, by Mr. C. F. M. Swynnerton :— 
“You will have received my postcards of the past few 
mails and been interested in the consistent way in which 
your expectations have been fulfilled. 
‘““ Emergences have taken place since last mail from a 2nd 
brood of cenea parentage and one of trophonius parentage. 
There are relatively few pupae left, and it may be interesting 
to sum up the results as they now stand :— 
‘* Hippocoon 2 parent: many families: @ offspring always 
hippocoon. 
“ Cenea 2 parent: two families: 2 offspring hippocoon, 
intermediate and cenea. 
‘“ Trophonius 2? parent: one family: Q offspring only 3, viz. 
2 hippocoon and 1 trophonius. 
“« Niobe ? parent: one family: 9 offspring hippocoon, niobe 
and intermediate between nzobe and cenea. 
‘The families are small, the result not only of early losses 
but of the damage to pupae, through the muslin, by my ground 
hornbills. I did not realise the extent of these latter losses 
till I finally moved the pupae from the sleeves to boxes. The 
damage has resulted sometimes in non-emergence, sometimes 
in deformity. It is especially a pity in the families of nzobe 
and cenea, as these were producing interesting intermediate 
forms. However, the main point to be tested has come out 
pretty clearly, and in accordance with your expectations.” 
Prof. Poutton said that Mr. Swynnerton’s breeding experi- 
ments showed that the Aippocoon form at Chirinda in §8.E. 
Rhodesia is, genetically, just as predominant as the cenea 
