54 
SATYRIDAE 
wings ; the bands are broken up by the nervures into five or 
six oval patches with central black dots on the fore wing ; 
and three or four similar markings on the hind wing. The whole 
of the head and body, also the basal half of the wings, are 
clothed with long fine cilia ; the fringes are downy and ample, 
of a greyish-brown colour, lighter in the female. The under 
side is similar to the upper, but rather lighter in colour ; on 
the fore wing the fulvous band is more complete, but less so 
on the hind wing. 
E. epiphron is found flying only during sunshine. Directly 
a cloud obscures the sun, it drops to the ground and lies 
hidden in the grass with closed wings. At night it usually 
rests on the stems of herbage close to the ground. 
Life of Imago. The life of this little butterfly does not 
exceed twenty days or thereabouts. 
Aberration. Both in the size and definition of the bands 
great aberration occurs. In some specimens they are broad 
and distinct, in others they vary in development until they 
exist only as inconspicuous fulvous rings encircling the black 
dots; while in extreme cases they disappear altogether. 
Sometimes on the upper surface the black spots have white 
centres and more often are present on the under surface, 
especially in the females. 
The true E. epiphron has the bands unbroken on the fore 
wing and almost so on the hind wing. The form with broken 
bands on both wings is known as ab. cassiope, Fab., which is 
the normal type found in the British Isles. If the true 
E. epiphron exists in Britain, it is exceedingly scarce. 
This butterfly is liable to vary towards albinism, having 
one or more wings of a whitish colour. 
Genus EREBIA, Dalman, 1816 
THE SCOTCH ARGUS 
Erebia aethiops (Esp., 1777). 
(Plate V, facing page 48) 
The Scotch- Argus appears to fly during sunshine only ; 
directly the sun is obscured by cloud it disappears from view, 
