( (elaxsix)-) 
light, but with the ribbed upper wall removed, the 
scales are absolutely colourless. 
L. iolas is lemon colour, as also are the thick hair-like scales ; 
in the latter however a considerable number of grey 
granules are present. 
Lampides aelianus is almost more white than blue under 
direct light but the scales become quite transparent 
and colourless under transmitted light; this applies 
both to the ordinary scales and to the “ blasen- 
schuppen.” As an opaque object under very white 
condensed light, a single scale has a slightly milky 
appearance, but if placed over other scales the very 
pale whitish blue is at once apparent; the “ blasen- 
schuppen” are dirty cream colour, but over other 
scales they are exactly the same colour as the ordinary 
ones. 
Thysonotis apollonius has the ordinary scales pale very 
bright blue, the two sex scales are also blue, the 
plumules being pale whitish blue under direct light, 
but transmitted light shows that there are two kinds 
of these plumules, one of which becomes quite trans- 
parent and colourless, whilst the other is finely 
shagreened all over and is dark neutral grey. The 
‘“*blasenschuppen ”’ are sometimes clear and colour- 
less, but generally have a yellowish tinge: the 
ordinary scales become tawny yellow. 
T. hengis again has the “‘ blasenchuppen ”’ blue, but under 
transmitted light they are clear and colourless. 
The ordinary scales are of a strong mauve blue, but 
under transmitted light they become pale yellowish, 
showing thus a marked contrast in inverse degree 
from that obtaining in apollonius. 
Thysonotis caeleus is quite deep blue in colour, but under 
transmitted light it is deepish lemon, the “ blasen- 
schuppen”’ being very slightly yellowish, though 
under direct light they are practically colourless. 
Hypochrysops rex, with its intense ultramarine blue, becomes 
deep bronze under transmitted light. 
Arhopala helius is deep rich purplish blue, becoming pale 
