FAMILIES REARED 263 



in which it appears is influenced by the varying pro- 

 portions of these models. Reasons have already been 

 given for regarding eurytus as a species at least partially 

 protected." 



On November 23, 1912, Professor Poulton writes 

 again : 



" The non-variation of imitator seems to me quite 

 explicable by selection, for in its locality there is only 

 one Planema. Rogersi may be looked upon as the con- 

 necting link between Uganda and Natal, and I have not 

 the least doubt that there are plenty of Pseudacraeas in 

 British East Africa and further south, but they are mis- 

 taken for Planema by collectors. ... I have no doubt 

 you are right about hobleyi being the most distinct form ; 

 that it should keep its sexual dimorphism so clearly is 

 further evidence of this, and I should suspect it does 

 follow the Mendelian relationship to one or both of the 

 others. It would be very interesting if this could be 

 tested : the main reason against it is the very great 

 abundance of intermediates. For this reason I should 

 very much doubt a Mendelian relationship between 

 terra and obscura." 



Since " Toby " was reared I have been fortunate enough 

 to obtain eggs from females kept in captivity. They 

 were put with branches of the Chrysophyllum into a large 

 wooden box whose sides and top had been partially 

 replaced by mosquito net. The box was placed on tins 

 standing in water in a large basin which stood on a fallen 

 tree trunk in a small open place where gleams of sun- 

 shine could penetrate into the cage. I had no success 

 unless the butterfly was kept in the forest, since the 

 species seems to be easily killed by the less humid atmo- 

 sphere outside the forest, and the greater heat. Several 

 small families were reared from known mothers, and 

 may be seen with the parents in the Hope collection at 

 Oxford. 



