326 Mr Brindley, The proportions of the sexes 
The proportions of the sexes of Forficula auricularia im the Scilly | 
Islands. By H. H. Brinpuey, M.A., St John’s College. 
[Read 1 7 November 1913] 
In the Proceedings, vol. xvi. pt. 8, 1912, p. 674, I summarised " | 
the results of enumerating the sexes of adult individuals of For- 
ficula auricularia, the Common Earwig, in collections obtained from 
‘St MARY’S 
42-0 
ST MARTIN’S 
x 
Middle Town 
40:9 Porth} Hellick 
ation 
OJ Newfors 45:2 
NORTHWETHEL 
MoryvelS Sr. 
1I9°2 
SAMSON 
«9 
Ke) 
wl 
Sa 
uG 
ra) 
& 
3S 
Oo 
> 
_ The figures indicate the percentage of male Forficula auricularia. : 
Bishopo Rock 
29 localities in the British Isles. It was explained that this study 
of the proportions of the sexes arose incidentally to an enquiry, 
