_Female._ Length 4-1/2 lines. 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, also the posterior femora, pale ferruginous; the wings subhyaline, the nervures dark fuscous. Abdomen: the apical margins of the segments obscurely and narrowly rufo-piceous, the apex ferruginous. _Hab._ Celebes. Gen. MACROMERIS, _St. Farg._ 1. Macromeris splendida, _St. Farg. Hym. iii._ 463. 1. [Symbol: male]. _Hab._ India, China, Malacca, Borneo, Java, Celebes. Gen. MYGNIMIA, _Smith_. 1. Mygnimia iridipennis, _Smith, Journ. Proc. Linn. Soc._ ii. p. 98. _Hab._ Celebes, Borneo.