(ol ) 
I therefore regard this as an early type; they (the scales) are 
longish, of moderate width, tapering rather wider to the 
apex which is scalloped more or less deeply. There is a 
large admixture of brown scales of quite different pattern 
throughout the wing. The “Tlasenschuppen” are very 
difficult to estimate, some are almo;'t spherical, some are ovate 
with broadly rounded ends, othe: are very similar to the 
arton group; they have seventeen rows of fine reticulations. 
Aurivillius has already pointed out that S. orion has no 
“ blasenschuppen,”’ and my own observations confirm this. 
In iolas the blue scales are somewhat specialised, in the 
subcostal area they are longish, of varying widths, many having 
scalloped apices but in very varying degrees, and some have 
almost even or very slightly arched apices; it will be remem- 
bered that iolas, without being lustrous at all, is yet a very 
blue species, and the great majority of the blue scales are 
short and very broad, almost as broad as long, evenly termin- 
ated in a decided arch and very finely ribbed; they differ 
however in length in different parts of the wing; near the 
base they are longer and occasionally one will be seen dis- 
tinctly scalloped, in the terminal area they are narrower and 
evenly oblong, the species has also the thick hair-like scales 
found so plentifully in the genus Polyommatus; they are of 
even length and terminated in a blunt point. The “ blasen- 
schuppen’”’ are somewhat pyriform with eleven and twelve 
rows of coarse reticulations. In the subcostal area are several 
scales quite like the “ blasenschuppen” in structure and 
sculpture, but about three times the size, and might be de- 
scribed as narrowly fan-shaped (an enlarged pyriform would 
be approximately fan-shaped), they take the place of the 
‘“ blasenschuppen ” and are mixed with them. I found them 
in each of the specimens examined, but in some there are 
only one or two whilst in others there are more of them; 
they are however of interest in that they show that mutation 
in this special form of scale is in operation. 
Melanops is a species rather strongly blue to the naked 
eye; there is however a very large admixture of ordinary 
brown scales in both wings which are superposed on the blue 
ones; these latter approach closely to the patterns obtaining 
