( 2&xci- )) 
nelsoni, Grose-Smith. Further evidence against the hypo- 
thesis of climatic influence was derived from Mr. Wiggins’s 
series of P. paragea, in which were found the two remarkable 
specimens exhibited to the meeting. In one of these, a male 
captured June 26th, 1910, the yellow markings had almost 
entirely disappeared, while in the other, a female, taken Aug. 
29, 1909, they were immensely extended, especially on the 
hind-wing, where the pale expanse was even two or three 
times as large as the white area of the female epuea from 
Lagos. Here was a single individual in which the normal 
change in the eastern part of the range was reversed, the 
insect being lighter and paler instead of dingier in appearance. 
Such a variety throws strong light upon the origin of mimetic 
resemblance ; for this pale individual presents considerable 
likeness to P. arenaria, and affords the foundation upon 
which a close resemblance might be developed by selection. 
There can hardly be any example as yet known which better 
enables us to understand the production of mimicry between 
forms closely allied but superficially very different in appear- 
ance: yet in its production the operation of climatic influence 
is extremely improbable, and we are thrown back upon causes 
of variation at present unknown and mysterious. 
PSEUDACRAEAS OF THE HOBLEYI Group ON DamBa ISLAND as 
COMPARED WITH THOSE FROM THE ENTEBBE District.—Prof. 
Poutton exhibited a set of the mimetic Pseudacraeas and their 
models collected by Mr, C. A. Wiggins in the neighbourhood of 
Entebbe, viz. :— 
PLANEMA MODELS. PSEUDACRAEA MIMICs. 
macarista, E. M. Sharpe, 6. hobleyi, Neave, 6. Also a 2 with 
pogaget nelsoni, Gr.-Sm., 6 and 9°. the colouring of the ¢. 
macarista, @. hobleyi, 2. 
alcinoe, Feld., 2. (This model was 
not exhibited. ) 
tellus platyxantha, Jord. terra, Neave. 6 and @. 
paragea, Grose-Smith, g and @°. obscura, Neave, g and ?. (The 
3 was not exhibited. ) 
