- THE ENTOMOLOGIST. 
[No. 700 
Vou. LIV.] SEPTEMBER, 1921. 
PIERIS RAPAt, GYNANDROUS AB. 
By F. W. Frouawk, F.E.S., M.B.O.U. 
GYNANDROMORPHISM is of such exceedingly rare occurrence 
among the Pieride, especially as regards our three common 
species, P. brassice, P. rape and P. napi, that it is with pleasure 
I am able to give a figure of probably a unique gynandrous 
example of P. rape, now in the cabinet of Mr. Douglas C. 
Johnstone, to whom my thanks are due for the loan of the 
specimen for figuring. It was taken by the late Herbert Williams 
on June 6th, 1891, at Boxhill, Surrey. As will be seen by the 
drawing, the left fore wing is wholly that of a normal male, and 
the costal areas of both the right fore and hind wings, as well 
as the costal spot on the latter, are of male colouring and 
marking ; while the rest of the right wings and the whole of the 
left hind wing are of female colouring and markings. I know 
of no similar example of this species. The only gynandrous 
P. brassice known to me was a specimen taken many years ago 
by the late Mr. George Bryant, who sent it by post to the 
late Mr. Sidney Webb, but unfortunately it was smashed to 
fragments. 
August, 1921. 
ENTOM.—SEPTEMBER, 1921. 8 
