Revision of the Genus Hrebia. 185 
sionally in other parts of Switzerland, being less distinctly 
marked than those from Tyrol and Carinthia, where in 
certain places it is very abundant. On the San and Kur 
Alps near Stetzing it seems to be very numerous, and 
flies in company with #. pharte (which it often very 
closely resembles), cassiope, and melampus. I have taken 
it myself only in the Lechthal, near the Arlberg pass, 
and failed to recognise it at the time. Dr. Chapman 
found it at San Anton, on the east side of that pass, 
the specimens from these places being intermediate be- 
tween those from Switzerland and Carinthia. 
It may be recognised on the upperside by the shape, 
and especially by the position, of the fulvous markings of 
the hindwing ; these are normally four in number, of which 
in Swiss specimens the two hindermost are usually faint 
or absent, and in Carinthian examples usually distinct. 
These marks are not placed in a regular line parallel to 
the outer margin, as in L. pharte, melampus, and cassiope 
but in pairs, of which the upper two are close together, 
and the second, always the most conspicuous, and the last 
to disappear, is more or less elongated towards the base of 
the wing. The band of the forewing has usually two (in 
the females and in both sexes from Carinthia sometimes 
three or four) black spots, which are very rare in E. pharte 
(I have only two females which show any trace of them), 
On the underside the male has the base of the forewing 
more suffused with rufous and the band of the forewing 
not so well defined. On the hindwing in the females and 
Carinthian males there is sometimes a fifth spot nearer 
the costa, in which case the elongated spot is the middle 
one. The colour of the hindwing in the female is more 
chocolate, and less grey than in Z. pharte. From £. mel- 
ampus it may be known by the absence of black eyes in 
the fulvous spots of the underside of the hindwing. There 
are occasionally small male specimens of Z. manto var. 
pyrrhula, which are hard to distinguish from Swiss speci- 
mens of L. eriphyle, and these as well as abnormal melam- 
pus often stand for it in collections; but, by using glass- 
bottomed drawers, which enable the whole series of 
undersides to be seen at once, the difference, however 
slight, can be appreciated, and though the females of 
ertphyle, pharte, and melampus are close, that sex of 
£. manto in all its varieties is easily distinguished by 
the pale base of the hindwing below. 
TRANS. ENT. SOC. LOND. 1898.—PART II. (JUNE.) 13 
