S-1141001_COMPLETO.pdf

50 HEATH BUTTERFLY.
permanent varieties seeming, as in the case of some other species,
to belong to particular localities.
One described under the name of 'Polydama,' measures about
an inch and a half in the extent of its wings; the fore wings
are of a yellow brown colour, with two obscure eyes. The
hind wings are brown, but with the inner edge broadly
marked with dull white or pale buff, and there is a small
obscure eyelet near the hind angle.
Another, described by the specific name of 'Typhon,' of the
same size as the previous named ones, is described as follows:
—On the upper side the wings are of a rusty grey or ochre-
colour; brown at the base. The hind wings are generally
darker, and without any distinct eyes. Underneath, the fore
wings are dusky at the base, followed by an irregular whitish
stripe, and the other part greenish ash-colour, with from two
to five small eyes, occasionally obsolete. The hind wings are
greenish brown at the base, with an irregular interrupted bar,
(this interruption forming the ground of the formerly supposed
specific difference,) beyond the middle of the wing, and generally
with about six small eyes, but their number is very variable:
this bar is followed by a shade of greenish brown.
The female has the wings paler, and more tinged with ochre,
with a large pale blot on each. The bar is succeeded by an
ochre shade.
Mr. Westwood remarks on these different varieties, or supposed
species, that in Davus all the markings are complete, distinct,
and unclouded; in Polydama they are somewhat paler and less
defined; and in Typhon the broad band is divided into two
irregular marks, while in further varieties some of the marks
disappear altogether, and all are fainter. Also that Davus has
the little rings always more or less defined on the upper side,
and is of a dull brown colour with a slight inclination to grey,
the darker parts inclining to olive green. Typhon and Polydama
have the little rings very slight, and in some instances altogether
wanting on the upper side, while also the ground colour is
somewhat paler, and inclining to tawny, and on the under side
all the markings are paler and less distinct.