The Descent of Man

ation (10. E. Doubleday, 'Annals and Mag. of
Nat. Hist.' vol. i. 1848, p. 379. I may add that the
wings in certain Hymenoptera (see Shuckard,
'Fossorial Hymenoptera,' 1837, pp. 39-43) differ
in neuration according to sex.), and sometimes
considerably in outline, as in the Aricoris epitus,
which was shewn to me in the British Museum
by Mr. A. Butler. The males of certain
South American butterflies have tufts of hair on
the margins of the wings, and horny excrescences
on the discs of the posterior pair. (11. H.W.
Bates, in 'Journal of Proc. Linn. Soc.' vol. vi.
1862, p. 74. Mr. Wonfor's observations are quoted
in 'Popular Science Review,' 1868, p. 343.) In
several British butterflies, as shewn by Mr.
Wonfor, the males alone are in parts clothed
with peculiar scales.
The use of the bright light of the female glowworm
has been subject to much discussion. The
male is feebly luminous, as are the larvae and
even the eggs. It has been supposed by some