h a transverse spot above the insertion of the antennae, an
abbreviated narrow line behind the eyes, another on the lower margin of
their emargination; the scape in front and the clypeus yellow, the
latter notched at its apex; a minute yellow spot at the base of the
mandibles; the antennae, tibiae, apex of the femora, and the tarsi
ferruginous; the basal joint of the intermediate and posterior tarsi
dusky; the intermediate femora deeply excavated or hollowed beneath; the
prothorax yellow above; the metathorax truncate, transversely striated
with several minute teeth on the lateral margins; the wings hyaline,
tinted with yellow, their apical margins slightly clouded; the apical
margins of all the segments of the abdomen bordered with yellow, that on
the first segment narrowest. The only particulars in which the female
apparently differs from Saussure's description, is that the second
fascia on the abdomen is _widest at the sides_, and there are _three
little teeth_ on each side of the margins of the metathorax.

The _Female_ is also in the Paris Museum.

2. Rhynchium superbum, _Sauss. Mon. Guepes Sol._ p. 113. 18.

_Hab._ Aru: New Holland.

Our example of this species slightly differs in coloration from the
description of Saussure. He says, "black, with the vertex, the front,
the prothorax, and the border of all the segments of the abdomen, except
the first, yellow; the wings yellow;" in the Aru specimen, the sinus of
the eyes, a spot above the clypeus, a reversed crescent-shaped spot
crossing the ocelli, two oblique spots behind them, and a broad elongate
stripe behind the eyes yellow. These slight differences cannot
characterize more than a variety; in every other particular they exactly
correspond.

Gen. ODYNERUS, _Latr._

1. ODYNERUS PETIOLATUS. _O._ niger; clypeo apiculato; capite, thorace
abdomineque flavo variis; abdomine petiolato; alis subhyalinis.

_Female._ Length 7-1/2 lines. Black; head and thorax strongly punctured;
two confluent spots between the antennae, a line on the inner orbits of
the eyes, terminating in their emargination, an oblong spot behind them,
a spot at the base of the mandibles, the scape in front, and the clypeus
yellow; the latter with a large black spot in the middle, and with its
anterior margin prolonged into an acute point; the mandibles
ferruginous, with their base and margins black; the flagellum fulvous
beneath. Thorax: an interrupted line on the collar, a spot beneath the
w