PLATE XIX. Fig. 1[34].
Pap. Thetis, _Fabr._--Nymph. Thetis, _Godart_.--Pap. Petreus,
_Cramer_, Pl. 87, fig. D, E; _Stoll’s Supp._ Pl. 2, fig. 2, A,
(caterpillar), fig. 2, B, (chrysalis); _Swainson’s Zool. Illus._ Pls.
59 and 110.
This singular looking insect is distinguished generically by the
peculiar shape of the wings, and the equally remarkable appearance of
the caterpillar. Of the former the posterior edge of the primary pair
is concave, and the apex is distinctly truncated; the same edge of
the secondary wings has two long linear tails, the anal one shorter
and curved outwards, the external long, obtuse at the extremity, and
turned somewhat obliquely outwards. The caterpillar is naked, with four
long fleshy filaments on the back, and two others projecting from the
hinder part of the head; the chrysalis likewise with several projecting
filaments.
The Marius butterfly is a native of Guiana and Brazil. The colour of
the upper side is tawny, varying somewhat in the shade according to
the sex, the surface traversed by three black narrow lines, running
obliquely from the anterior to the abdominal margin: near the base, and
between the second and third lines are the rudiments of two others, and
the costa is likewise black, as well as the posterior margin behind the
middle: the under wings are black along the hinder edge, and likewise
the tails, and on the anal angle are a few whitish crescents placed
over two black points surrounded by a white circle. The colour of the
under side is rusty-brown, glossed with violet and pale green, and
across the middle of both wings there is a dark oblique line, having a
series of black ocellated spots behind it.
[Illustration: