ely, pale fuscous; the
club of the antennae 2-jointed.

_Hab._ Aru.

6. MYRMICA CARINATA. _M._ obscure fusco-ferruginea; thorace rufo-fulvo;
capite thoraceque carinis irregularibus; metathorace spinis duabus
longis armato.

_Worker._ Length 1-1/4 lines. Head and abdomen black, with more or less
of an obscure ferruginous tinge, particularly at the vertex and base of
the abdomen; the thorax and nodes of the petiole ferruginous; the legs
rufo-piceous, with the tarsi and articulations ferruginous, the antennae
and mandibles ferruginous; the head and thorax with irregular distant
longitudinal carinae; the sides of the thorax rugose; the spines on the
metathorax long and acute; the abdomen very smooth and shining; the club
of the antennae 3-jointed.

_Hab._ Aru.

Gen. CREMATOGASTER, _Lund_.

1. Crematogaster obscura, _Smith, Cat. Hym. Ins., Journ. Proc. Linn.
Soc._ ii. 76. 4 [Symbol: Mercury].

_Hab._ Aru; Borneo.

2. CREMATOGASTER ELEGANS. _C._ pallide rufo-testaceus; abdomine
nigerrimo nitido; thorace bispinoso.

_Worker._ Length 3/4 line. Entirely pale rufo-testaceous, excepting the
eyes and abdomen which are jet black; the nodes of the petiole pale,
smooth, and shining. Head about the same width as the abdomen. The
lateral angles of the anterior margin of the prothorax acute, the
metathorax armed with two long acute spines. Abdomen heart-shaped, its
apex acute.

_Hab._ Aru.

3. CREMATOGASTER INSULARIS. _C._ niger, laevis et nitidus; antennis
tarsisque pallide testaceis; thorace spinis duabus acutis armato.

_Worker._ Length 1-1/4 line. Black, smooth and shining; the vertex,
thorax and nodes of the peduncle with an obscure ferruginous tinge; the
antennae, tarsi, and articulations of the legs pale rufo-testaceous; the
spines which arm the metathorax stout, elongate, and acute, with their
apex pale testaceous. Abdomen heart-shaped and very acute at the apex.

_Hab._ Aru.

Gen. SOLENOPSIS, _Westw._

1. SOLENOPSIS CEPHALOTES. _S._ pallide ferruginea; capite maxime in
medio sulcato, abdomine apice fusco.

_Worker major._ Length 2-1/2 lines. Pale ferruginous, with the anterior
part of the face darker, the mandibles incrassate and very dark
fusco-ferruginous; head very large and divided by a deep longitudinal
channel, emarginate behind, nearly quadrate; the eyes small and placed
forwards on the sides of the head. The metathorax truncate, not spined.
Abdomen ovate, truncate at the base, its apex fuscous; the