222 Bionomic notes on Butter files from the Victoria Nyanza 



Seasonal Forms. 



Pressure of time, owing to ray sudden departure to N.E. 

 Rhodesia in January 1904, prevented me from studying 

 the seasonal forms in this collection as much as I should 

 have wished. They seem to be mainly of interest in the 

 following particular. Just as on the equator the seasons 

 are not nearly so well marked as in South Africa, so the 

 seasonal forms are not so well marked, while intermediates 

 are more common. 



The most interesting specimens are several fine dry 

 season Precis ccelestina, Dewitz, and some remarkable 

 intermediate and dry specimens of P. archesia, Godt. 



In conclusion, I should like to express my unbounded 

 gratitude to Professor Poulton, D.Sc, F.R.S., of the Hope 

 Department, Oxford University Museum, at whose sugges- 

 tion the work was undertaken, and who has given me the 

 inestimable benefit of his unique knowledge of these 

 subjects. 



