. Black; the face densely covered with
silvery-white pile; a narrow line at the inner orbits of the eyes, the
palpi and mandibles yellow; the latter ferruginous at their apex. The
posterior margin of the prothorax rounded and yellow; a minute yellow
spot on the mesothorax touching the scutellum, the thorax and abdomen
covered with a changeable silky pile; the wings subhyaline, their
nervures fuscous, a broad dark fuscous border at the apex of the
superior pair. A transverse spot on each side of the basal margin of the
second and third segments, and an emarginate fascia on that of the
fifth, yellow.

5. POMPILUS DECEPTOR. _P._ rufescenti-flavus; vertice nigro, alis
anticis apice fuscis.

_Male._ Length 6 lines. Pale reddish-yellow; the antennae slightly dusky
above; a black transverse stripe on the vertex between the eyes, and
another issuing from it in the middle and passing beyond the ocelli.
Thorax: a black stripe on each side of the mesothorax over the tegulae;
the wings subhyaline, the nervures ferruginous, the superior pair
fuscous at their apex. Abdomen immaculate.

Subgenus PRIOCNEMIS.

1. PRIOCNEMIS RUFIFRONS. _P._ niger; facie, antennis, tibiis tarsisque
ferrugineis, alis fulvo-hyalinis; abdominis segmento apicali flavo
unimaculato.

_Female._ Length 9-1/2 lines. Black; the face above the clypeus, as high
as the anterior ocellus, reddish-yellow; the extreme edge of the
clypeus, the labrum and base of the mandibles ferruginous; the antennae
reddish-yellow. Thorax: fulvo-hyaline, with a dark fuscous border at the
apex; the knees, tibiae and tarsi reddish-yellow; the two latter spinose.
Abdomen: gradually tapering to an acute point at the apex, the sixth
segment with an elongate red spot.

_Hab._ Celebes.

Subgenus AGENIA.

1. Agenia blanda, _Guer. Voy. Coq. Zool._ ii. pt. 2. p. 260.

2. AGENIA BIMACULATA. _A._ nigra, cinereo-pilosa, clypeo plagis duabus
flavis; antennarum articulis apicalibus, tibiis tarsisque anticis et
intermediis femoribusque posticis ferrugineis; alis subhyalinis,
nervuris nigris.

_Female._ Length 7 lines. Black, and covered with ashy pile; a large
macula on each side of the clypeus, the mandibles and palpi yellow; the
base and apex of the mandibles rufo-piceous; the flagellum pale
ferruginous, more or less fuscous above towards the base. Thorax: the
posterior margin of the prothorax arched; the anterior and intermediate
tibiae and tarsi and the femora at their apex beneath, al