ine the
nervures black, the base of the wings yellowish; the apical joints of
the intermediate tarsi, the tips of the posterior femora, the extreme
base of the tibiae, their apical half, and the tarsi black; the
intermediate portion of the tibiae yellow; the apical segment of the
abdomen black.

_Hab._ Aru.

Gen. MESOSTENUS, _Grav._

1. MESOSTENUS PICTUS. _M._ niger; capite thoraceque flavo striatis et
punctatis; pedibus flavis nigro et ferrugineo lavatis; segmentis
abdominalibus flavo marginatis; alis hyalinis.

_Female._ Length 8 lines. Black; a large ovate spot on the cheeks
touching the mandibles, the labrum, palpi, inner orbits of the eyes, and
from the 7th to the 10th joints of the antennae yellowish-white. Thorax:
an ovate spot in the middle of the disk of the mesothorax, the tegulae, a
spot beneath them, two larger spots beneath the wings, the scutellum, a
spot on the postscutellum uniting with another at the base of the
metathorax, a trilobed spot at its apex, and a subovate one on each side
yellowish-white; the coxae white with black stains on the intermediate
and posterior pairs; the femora white beneath, the anterior and
intermediate pairs with a black line above, the posterior pair
ferruginous above; the tibiae and tarsi whitish beneath, stained more or
less fusco-ferruginous above; wings hyaline. Abdomen: all the segments
with yellowish-white fasciae on their apical margins, the fasciae
continued beneath; the ovipositor about the length of the abdomen, the
valves broadest at their apex.

_Hab._ Aru.

2. MESOSTENUS AGILIS. _M._ niger; antennis medio albis; thorace
pedibusque albo variegatis; abdominis marginibus fasciis albis.

_Female._ Length 5 lines. Black; the joints of the antennae, from the 6th
to 13th, white, the vertex also white. Thorax: a spot in the middle of
the disk of the mesothorax, the scutellum, a spot on the postscutellum,
two beneath the wings, the apex of the metathorax, and a spot on each
side white; the legs white, the anterior pair slightly fuscous above;
the intermediate femora and tibiae beneath, and the tarsi above, black;
the posterior femora above and beneath the tibiae, except their extreme
base and the base and apex of the tarsi, black; wings hyaline, the
nervures black. Abdomen: the apical margins of the segments, excepting
the fourth and fifth, with white fasciae, the second and third fasciae
attenuated in the middle.

_Hab._ Aru.

3. MESOSTENUS ALBOPICTUS. _M._