orax
smooth and shining; the meso- and metathorax above transversely
striated, the scutellum longitudinally so; the legs ferruginous, with
their coxae black; a spot of silvery-white pubescence on each side of the
metathorax at its base, and two at its apex close to the insertion of
the petiole; the wings fulvo-hyaline with the nervures ferruginous.
Abdomen: the petiole and the following segment red, the base of the
third also slightly red; the three apical segments obscurely blue, with
a thin glittering pile.

The _male_ differs in having the legs black, their articulations only
being ferruginous; the head entirely black with the face densely covered
with silvery-white pile. The thorax is sculptured as in the other sex;
the petiole more elongate and slender, the basal joint black, the second
and the first segment ferruginous beneath; the rest of the abdomen blue.

_Hab._ Celebes.

Gen. PELOPAEUS, _Latr._

1. Pelopaeus Madraspatanus, _Fabr. Syst. Piez._ p. 203. 3.

_Hab._ Malabar, Madras, Nepaul, Bengal, Celebes.

2. Pelopaeus Bengalensis, _Dahlb. Syst. Nat._ i. 941. 2.

_Hab._ India, Philippine Islands, China, Isle of France, Celebes.

3. PELOPAEUS INTRUDENS. _P._ niger; clypeo bidentato, tibiis anticis et
intermediis, femorumque apice, femoribusque posticis basi,
trochanteribus, tibiarum dimidio basali, petioloque rufescenti-flavis;
alis fulvo-hyalinis.

_Female._ Length 11 lines. Black; the face with silvery pubescence; the
clypeus with two large blunt teeth at its apex, formed by a deep notch
in its anterior margin; the scape reddish-yellow in front. The meso- and
metathorax transversely striated; the wings fulvo-hyaline, the nervures
ferruginous; the anterior and intermediate tibiae and the femora at their
apex, the posterior femora at their base, the trochanters, the tibiae
with their basal half and the middle of the basal joint of the posterior
tarsi, reddish-yellow; the petiole of the abdomen of a paler yellow; the
abdomen smooth and shining. The male only differs in being rather
smaller.

_Hab._ Celebes.

Mr. Wallace says of this species, "A common house-wasp in Macassar;
builds mud cells on rafters."

_Note._--In describing the species of this genus collected by Mr.
Wallace at Borneo, I incorrectly gave that locality for _P. javanus_.
The insect mistaken for that species may be shortly characterized as P.
_benignus_, length 12 lines. Opake-black, with the petiole shining; the
metathorax transver