C. niger; capite striato, angulis posticis spinosis; thorace spinis duabus acutis elongatis armato; abdomine cordato. Worker. Length 2 1 / 2 lines. Opake-black; the head and thorax above, with a coarse irregular striation, intermixed with a rough granulation, the margins of the head crenulated, the posterior angles acute and slightly produced. Thorax armed posteriorly with two stout diverging spines. Abdomen oblong-cordate, finely and irregularly striated; sprinkled with distant short white erect setae; the nodes of the peduncle rugose.
Hab, Celebes (Tondano).