lack stain, the coxae ferruginous above, the tibiae and tarsi
ferruginous beneath; wings hyaline, with a fuscous stain along the
anterior margin of the superior pair. Abdomen: a yellow fascia on the
apical margin of the first and second segments; that on the following
segments rufo-testaceous.

_Hab._ Aru.

6. ICARIA UNICOLOR. _I._ rufescenti-fusca, tenuiter cinereo-pubescens.

_Female._ Length 5 lines. Reddish-brown, covered with a thin cinereous
pubescence; the clypeus acutely angular anteriorly; the metathorax
oblique and delicately striated transversely; wings fusco-hyaline; the
petiole of the abdomen long, the segment campanulated and narrow.

_Hab._ Key Island.

Gen. POLISTES, _Latr._

1. Polistes tepidus, _Fabr. Syst. Piez._ p. 271. 7.

_Hab._ Aru; Key Island; Solomon Islands; New Guinea; Australia.

2. Polistes diabolicus, _Sauss. Mon. Guepes Soc._ 68. 26, t. 6. f. 7.

_Hab._ Aru; Java; Timor.

3. Polistes stigma, _Fabr. Syst. Piez._ p. 261. 41.

_Hab._ Aru; Celebes; Ceram; India.

_Var._ The specimens from Aru differ from the typical ones in wanting
the two longitudinal yellow lines on the metathorax, which is entirely
black. Saussure has a variety with the metathorax black between the
lines; of two examples from Celebes, one has the yellow lines entire,
the other has them abbreviated at half their length.

4. POLISTES NIGRIFRONS. _P_. capite thoraceque nigris, flavo et
ferrugineo variegatis; abdomine ferrugineo, segmentis basi nigris,
marginibus apicalibus flavis.

_Female._ Length 8 lines. Head and thorax black; the anterior margin of
the clypeus angular and narrowly rufo-testaceous; the mandibles, palpi,
and antennae ferruginous; the scape, and flagellum above, except the
basal joint, fuscous; the outer orbits of the eyes with a narrow yellow
line. The anterior margin of the prothorax slightly rebordered, the
posterior margin ferruginous; the outer margin of the tegulae
reddish-yellow; wings subhyaline with a fusco-ferruginous stain along
the anterior margins of the superior pair; the metathorax finely
striated transversely, and with two yellow stripes running upwards
halfway from the base, the posterior margin of the pectus, tips of the
coxae, the femora at their base and apex, the tibiae and tarsi beneath,
ferruginous; tips of the femora, and tibiae above, yellowish. Abdomen
ferruginous, with the base of the second and following segments black;
the first and three following segments with a