is at first sight very like the _P. geometrica_ from
Singapore; but the striation of the abdomen alone will serve to
distinguish it.

3. PONERA PARALLELA. _P._ nigra, opaca; antennis, mandibulis, pedibus
abdominisque apice ferrugineis.

_Worker._ Length 3-1/4 lines. Opake black; the antennae thick and
scarcely as long as the thorax, their apex and the mandibles bright
ferruginous; the legs somewhat obscure ferruginous, with the
articulations much brighter; the head a little wider than the thorax and
subovate; the thorax, node of the petiole, and the abdomen of nearly
equal width, the abdomen being slightly the widest; the node of the
petiole nearly quadrate; the apical margin of the first segment and base
of the second slightly depressed.

_Hab._ Aru.

4. PONERA QUADRIDENTATA. _P._ atro-fusca; antennis, facie antice,
antennis, mandibulis, tibiis tarsisque ferrugineis; alis subhyalinis.

_Female._ Length 3-1/2 lines. Nigro-fuscous; the antennae with a carina
between their base, the face anteriorly, the mandibles, the legs, and
the abdomen at its apex and beneath, ferruginous; the femora and coxae
above, fuscous; the head subquadrate with the angles rounded; the eyes
small and placed forwards on the sides of the head towards the base of
the mandibles, the latter with four strong teeth on their inner margin.
Thorax oblong-ovate with the metathorax truncate; the wings
fusco-hyaline, the stigma large and black. Abdomen: the second segment
slightly narrowed at its base, the node of the petiole incrassate and
compressed, its upper margin rounded. The insect entirely covered with a
short downy cinereous pile, the abdomen having also a number of
scattered erect glittering hairs.

_Hab._ Aru.

Gen. ECTATOMMA, _Smith_.

1. ECTATOMMA RUGOSA. _E._ fusco-brunnea; capite, thorace, nodoque
rugosis; abdomine delicatule aciculato.

_Worker._ Length 4 lines. Obscure fusco-ferruginous, the antennae and
legs bright ferruginous; the head, thorax, and node of the petiole
coarsely rugose; the eyes very prominent and glassy; the mandibles
longitudinally but very delicately striated, their inner margin
edentate; the thorax slightly narrowed behind. Abdomen very delicately
aciculate.

_Male._ Length 3-1/2 lines. Of the same colour, and sculptured like the
worker; the head rounded behind the eyes and narrowed before them; the
eyes very large, prominent and ovate; the ocelli very bright and
prominent; antennae elongate and slender, t