( Ixxi ) 



interest of this when coupled with the fact that one of the 

 two Planema models, P. macarista, which has a black and 

 white female, is not known to occur east of the River Nile, 

 whereas the other, P. poggei, which has an orange band in 

 both sexes, does so. It is true that in the present case no 

 Planema of any species was actually taken during three days' 

 collecting in a patch of forest on the Siroko River to the west 

 of Mount Elgon, where the majority of the male-coloured 

 females of Psetulaa'aea hohleyi were taken. At the same 

 time Mr. Neave had recorded P. j)oggei from the Tiriki Hills 

 and Nyangori near Kisumu, in the C. A. Wiggins collec- 

 tion at Oxford, and had himself taken the same species on 

 the east side of Elgon, and also in North Kavirondo, where 

 it was not uncommon. Dr. Jordan had also been kind 

 enough to inform him, through Prof. Poulton, that there are 

 Kavirondo specimens of P. poggei in the Tring Museum, but 

 no P. macarista. 



The following are the details of the Uganda localities, the 

 full particulars of the country further east on the East African 

 side of the border not being available at the moment. 



August 1, 2, 1911, Busia, near the Sio River (the boundary 

 between British East Africa and Uganda) — 



2 Planema poggei, 1 $ Pseudacraea hohleyi (male coloured). 



1 <? 

 August 12-14, 1911, Siroko River, west of Mount Elgon— 

 16 (J Pseudacraea hohleyi 

 9 ? ,, ,, (male coloured) 



5? „ „ (typical). 



Prof. Poulton commented on the importance of the colour 

 change of these Pseudacraeas in this locality, tending as they 

 did to become monomorphic. 



Dr. LoNGSTAFF drew attention to the difference between 

 the fauna of this locality and that of the White Nile. 



Mr. G. A. K. Marshall also commented on the exhibit, 

 especially on the Asilids. 



PiERis NAPi AND VAR. BRYONiAE.— Mr. H. Main exhibited 

 series of P. napi and var. hryoiiiae, and read the following 

 note : — 



