( elv_ ) 
I believe from the admixture with the “ blasenschuppen ”’ of 
(so far as I am yet aware) a unique scale, imitating almost 
exactly the plumule but inserted into the wing membrane 
at the other end of the scale and being entirely beautifully 
pale blue; these are the apparently hair-like blue scales all 
over most of the wing that give it the well known rough 
texture, they are, however, not hair scales but of the shape of 
an Indian club, with the club part longer in its tapering than 
in the plumule, and the thin end also longer and thinner than 
is the case with the other scale, the result being that this 
blue scale is a much longer and more elegant one than is the 
plumule, its apex is also more elegantly shaped, being rapidly 
tapered down to a rather blunt point; again, it is evenly 
ribbed, the ribs being practically parallel and disappearing 
as they approach the narrower part, whereas the “ blasen- 
schuppen”’ are irregularly striated from a central line. | 
was much perplexed in my early examinations of this insect 
at finding a large number of blue plumules, as I at first thought, 
mixed up with the brown ones, the former all with their club 
apices towards the termen, whilst the latter had their club 
apices towards the base of the wings, and frequently deeply 
embedded among the ordinary wing scales; it was some time 
before I realised that I had before me a pseudo-plumule in 
the blue one; such however is without doubt the case. The 
plumule itself is a much coarser and rougher object; generally, 
though not always, decidedly shorter than its mimic, with its 
narrow apical end less narrow than the blue one, the tapering 
being much more rapid, and the broad end broader, the attach- 
ment stalk being a short one emitted from the broad base 
which is more triangular than the apex of the pseudo-plumule ; 
the striations of the plumule proper differ in number, they are 
striations, not reticulations, as is generally the case; I have 
counted from 15 to 18 or 19; they are deep and irregular 
and branch from each other, finally converging to a common 
termination at the apex. The essential difference in the two 
scales is that the broad club is the base and attachment end 
in the plumule whereas the club end in the mimic is the apex, 
the attachment to the membrane being at the thin basal 
end. Both the scales obtain in both the wings though the 
