volume 7 2nd Series, 1851, from a specimen captured at
Para by Mr. Bates, now in the possession of William Wilson Saunders,
Esquire. The insect was not enveloped in any pellicle, nor had the cell
been closed in any way; the wings were crumpled up at its side, as is
usual in Hymenopterous insects which have not expanded them, proving
satisfactorily that it had never quitted the cell, and that Trigonalys is
the parasite of Polistes.

"This discovery is one of much interest, proving the relationship of the
insect to be amongst the pupivora, to which family it had been previously
assigned by Mr. Westwood, see Volume 3 Ent. Transactions page 270. The
specimen is seven lines in length, entirely black, the head shining, the
thorax and abdomen opaque, and having two white maculae touching the
apical margin of the basal segment above; the wings are smoky, the
antennae broken off. Of one of them I found subsequently seventeen
joints--the perfect insect in the possession of Mr. Saunders having
twenty joints."

LEPIDOPTERA.

Drusilla myloecha, Tab. 4 fig. 3, 4.

This fine butterfly* was found flying in considerable plenty in the woods
of one of the islands of the Louisiade Archipelago; it forms a very
interesting addition to a genus, of which but few species are known, and
is allied to the Drusilla catops of Dr. Boisduval, described and figured
in the Voyage de l'Astrolabe. The upper sides of the wings of the
Drusilla myloecha are of pure white with a silky lustre, the front edge
of the fore wings margined with deep brown both above and below; in the
male there is a slender white line on the upper side running close to the
edge, and extending beyond the middle of it; the two discoidal veins in
the male are brown on the upper side, and the edge of the upper side of
the lower wings is brown. The under side of the lower wings has a dark
brown band at the base, widest close to the attachment of the wing and
narrowing to a large ocellus which it surrounds in the form of a narrow
brown ring; the black ocellus has a very small white pupil with a slight
bluish crescent on the inside, and is surrounded by a fulvous ring; thcre
is a second black ocellus nearer the hind edge than the middle, with a
small white pupil and a wideish fulvous ring, separated from the white of
the wing by a narrow brown ring; head, antennae, legs, and thorax in
front brown; palpi fulvous.

The figures are of the size of nature, and carefully drawn by Mr. Wing.