108 REV. F. A. WALKER, D.D., F.L.S., ON COLOURS IN NATURE. 
sublime’ in those forests (Life, ii, p. 55). Dr. Walker’s account 
of the two colours of the chameleon agrees with what I have seen 
of them in Asia Minor and in Algeria.” 
The Rev. THropore Woop, F.E.S., writes :— 
“ Page 86, near end.—The blue of the Morpho is due to iride- 
scence ; hence, probably, the stability of the colour when exposed 
to sunlight. 
‘None of our British moths are blue, and very few of them have 
any trace of blue about.them. I do not know enough of exotic 
species to state whether this rule holds good among them also ; but 
it is certainly a striking fact as regards those of our own country. 
Possibly blue is a colour depending more upon sunlight for 
its development than other hues; red, yellow, and green are all 
common enough among moths, although the last of these fades so 
rapidly that it is often only visible in recently-emerged specimens. 
“ Page 87, near end.—Larve of Arctia caja fed from birth upon 
black currant are said to produce very dark imagines. Specimens 
of Vanessa urticw and Polychloros, reared under blue or yellow 
glass, are also said to be pale and faded in appearance. In these 
cases the alteration in hue yn the imago would be due to influences 
affecting the earlier stages only ; but the second, of course, cannot 
occur in nature.” 
A discussion, of a conversational character, then ensued on various 
minor points in the paper, in which Major T. A. Freeman, M.A., 
Oxon., the Revs. Dr. Irving, F.G.S., and Dr. F. A. Walker, F.LS., 
and others took part. 
The meeting was then adjourned. 
