first node of
the petiole compressed, its margin rounded above, the second node
incrassate and subglobose; club of the antennae 2-jointed.

_Worker minor._ Length 1-1/2 line. Of the same colour as the _worker
major_, but with the head of the ordinary size and slightly narrowed
behind, the mandibles of the same colour as the head; the legs and
antennae longer, as well as the petiole of the abdomen; the body is very
smooth and shining, the club of the antennae 2-jointed.

_Hab._ Aru.

Subfam. CRYPTOCERIDAE, _Smith_.

Gen. MERANOPLUS, _Smith_.

1. MERANOPLUS SPINOSUS. _M._ castaneo-rufus; abdomine nigro, thorace
sexspinoso; abdomine ovato.

_Worker._ Length 1-1/2 line. Head and thorax rugose; the antennae and
tarsi rufo-testaceous; the eyes rather prominent, the groove above them
at the sides of the head extending backwards to the vertex. Thorax: the
anterior margin curved forwards, the lateral angles produced into a
bifurcate process on each side, behind the processes, slightly narrowed
to the base of a long curved tooth; the posterior margin emarginate with
a long sharp spine at each angle of the emargination; the node of the
petiole globose. Abdomen black, smooth and shining.

_Hab._ Aru.

Fam. MUTILLIDAE, _Leach_.

Gen. MUTILLA, _Linn._

1. Mutilla Sibylla, _Smith, Proc. Linn. Soc._ ii. 86. 11 [Symbol:
female].

_Hab._ Aru; Borneo; Celebes.

2. MUTILLA MANIFESTA. _M._ capite abdomineque nigris, thorace
sanguineo-rubro, maris alis nigro-fuscis.

_Female._ Length 4-3/4 lines. Head black and rugose. The thorax
blood-red and coarsely rugose, its anterior margin widest and straight,
the sides gradually narrowed to the apex in a slight curve; the lateral
margins have two teeth not wide apart. Abdomen black, rugose, and
slightly shining, with black pubescence above; on the under surface it
is glittering silvery-white; the legs and sides of the thorax have a
similar pubescence.

_Male._ The same size as the female, and the same colour; the eyes
notched. The thorax oblong-quadrate, the posterior lateral angles acute;
the tegulae large and red; the wings dark brown, with their extreme base
hyaline. Abdomen shining black, the first and second segments strongly
punctured, the rest much more finely and not very closely so.

_Hab._ Aru.

3. MUTILLA CARINATA. _M._ capite thoraceque metallico-purpureis viridi
tinctis, pedibus ferrugineis, abdomine nigro, basi pallido fasciata,
segmento secundo ad apicem fasci