Taxonomic history
Crawley, 1924a PDF: 401 (q.); Wheeler & Wheeler, 1954b PDF: 151 (l.).Senior synonym of Cataulacus insularis: Wheeler, 1919f PDF: 93; Bolton, 1974a PDF: 84.[Bolton gave priority to Cataulacus insularis but priority should rightly be given to Cataulacus horridus, on first reviser principle based on Wheeler's attribution: Bolton, 1995b: 138.].C. niger; capitis angulis posticis spinosis; marginibus capitis crenulatis; thorace aspere sculpto, spinis duabus acutis elongatis postice armato; abdomine ovato, basi striate.
Worker. Length 3 lines. Black; the antennae short, thick and clavate; the apex rufo-testaceous; head reticulated, produced before the eyes and widely truncated, the lateral angles of the truncation rounded; the lateral margins with a short spine before the eyes; the vertex with the posterior margin emarginate its entire width, forming at the lateral angles large acute spines. Thorax: ruggedly sculptured on the disk, narrowed to the apex of the mesothorax, which is separated from the hinder portion by a deep transverse incision; produced posteriorly at the angles into long, stout, acute spines; the nodes of the abdomen rugose; abdomen rounded, emarginate and striated at the base; the entire insect sprinkled with short erect white setae.
Hab. Borneo (Sarawak). Malacca.
Worker. Length 3 lines. - Black: the posterior angles of the head spinose, the margins of the head crenulated; the thorax armed posteriorly with two elongate, stout, acute spines; the an- tennae short, thick and clavate, their apex rufo-testaceous; the head reticulated, produced before the eyes and widely truncated anteriorly, the lateral angles of the truncation rounded, the lateral margins of the head with a short spine before the eyes; the pos- terior margin of the vertex emarginate its entire width, the lateral angles produced into long acute spines. Thorax ruggedly sculptured on the disk, narrowed to the apex of the mesothorax, which is separated from the hinder portion by a deep transverse incision, the posterior angles produced into long acute spines. The nodes of the peduncle rugose; the abdomen rounded, emar- ginate, and striated at the base; the entire insect sprinkled with short, erect, white setae.
Hab. Borneo (Sarawak).
