13 



trimenii, mimetic of A. zetes acara. The range and amount 

 of variation shows how easily the one form could be derived 

 from the other. 



Nine Lepidoptera collected in various localities in S. Nigeria 

 (1910) by Dr. J. J. Simpson were presented by the Entomo- 

 logical Research Committee of the Colonial Office. 



Additions to the Collections in 191 i. 



The comparative brevity of the following account of the 

 accessions in 191 1 is explained in the opening paragraph of 

 this report. 



The following valuable African collections have been pre- 

 sented by the Entomological Research Committee of the 

 Colonial Office. The three collections first named were made 

 by the Committee's Travelling Entomologist in East Africa, 

 S. A. Neave, Esq., M.A., B.Sc, Magdalen College. All the 

 specimens are accompanied by the admirably full and precise 

 data invariably recorded by Mr. Neave. 



(1) A series of 66 butterflies from Nyasaland and German 

 East Africa (1910). The series includes 3 examples of 

 Amanris ansorgei new to the collection, a fine female of 

 Planema epaea : 2 examples of a splendid new Lycaenid, 

 mimetic of the pattern of Acraea anemosa. This wonderful 

 new form, shortly to be described as a new species of a new 

 genus and named Sheffieldia after the captor by Mr. H. H. 

 Druce, is a most remarkable addition to the numerous 

 mimetic Lycaenids of Africa. The whole of this series of 

 butterflies is of the utmost value to the Collection, which 

 is rich in specimens from the areas both to the north and 

 to the south of German East Africa, but very poor in repre- 

 sentatives from the territory itself. 



(2) An interesting set of 48 butterflies, collected Feb. and 

 March, 191 1, in British East Africa, chiefly on the slopes of 

 Kenia and on the Aberdare Range. The series includes a 

 fine set of Acraea baxteri and of A. excelsior, as well as males 

 and a female of Acraea disjuncta and 2 butterflies exhibiting 



