than the abdomen.

_Hab._ Aru.

Gen. RHYSSA, _Grav._

1. RHYSSA MACULIPENNIS. _R._ rufescenti-flava; antennis et vertice
nigris; alis hyalinis, plaga nigro-fusca.

_Male._ Length 9 lines. Ferruginous; the head of a yellow testaceous,
with the vertex and antennae black; the scape ferruginous in front; the
mandibles black. Thorax: the mesothorax and scutellum transversely
rugose, the former with two deeply impressed lines in front, which
converge inwards, and meet in the middle of the disk; wings hyaline,
with a yellow tinge on the anterior pair, the nervures black; a black
stripe crosses the middle of the marginal cell, and terminates at the
inferior margin of the discoidal cell; the legs ferruginous, with the
posterior tarsi black. Abdomen smooth, shining, ferruginous.

_Hab._ Aru.

2. RHYSSA VESTIGATOR. _R._ ferruginea; antennis, mesothorace,
metathoracisque basi nigris; abdomine lineari, nitido et laevi; alis
hyalinis, apice subfuscato.

_Male._ Length 9 lines. Head testaceous-yellow, with the vertex
ferruginous; the antennae fusco-ferruginous. Thorax black, with the
prothorax, a large oblique spot beneath the wings, the scutellum, and
metathorax yellow, the base of the latter black; the mesothorax and
scutellum rugose; the metathorax smooth and shining; the legs
ferruginous, with the anterior coxae in front and the posterior pair
behind yellow; the posterior coxae black beneath; wings hyaline, faintly
clouded at their apical margins. Abdomen elongate, linear, glossy,
smooth, and shining, ferruginous, with the base and lateral margins
blackish.

_Hab._ Aru.

Gen. BRACON, _Fabr._

1. BRACON BASALIS. _B._ capite, thorace, pedibus anticis et intermediis,
femoribus posticis ferrugineis; tibiis tarsisque et abdomine nigris,
segmento basali flavo; alis fusco-hyalinis.

_Female._ Length 4-1/4 lines. The head, scape in front, thorax, anterior
and intermediate legs, the posterior coxae, trochanters, and femora, and
the first segment of the abdomen, and a semicircular spot in the middle
of the base of the second, yellow-ferruginous; the antennae, the
posterior tibiae and tarsi, fuscous; abdomen shining black; the thorax
smooth and shining; the wings fusco-hyaline. The basal segment of the
abdomen with a longitudinal impressed line on each side, the second
segment with an oblique depression, the third with an impressed line,
curved forwards and extending to the lateral margins; the base of the
segment has a row o