4. Myrmica suspiciosa ^HNS.

Jf. rufo-testacea, laevis, tota nitidissima nuda; mandibulis, antennis, pedum articulationibus tarsisque pallescentibus; metathoracis spinis minutissimis.

Worker. Length 1 line. Rufo-testaceous and very smooth and shining; the antennae as long as the insect; the flagellum, mandibles, tarsi, and articulations of the legs pale testaceous. The thorax narrowed anteriorly into a short neck, behind which it is dilated, the sides being rounded, the meso- and metathorax narrower and of nearly equal width, the spines of the metathorax minute and slender. The first node of the petiole somewhat wedge-shaped, the second globose, the abdomen very smooth and shining; club of the antennae 3 - jointed.

Hab. Aru,

I can detect no specific difference between this and Myrmica laevigata ^HNS, taken by myself in the neighbourhood of London; but it is not uncommonly met with in hothouses, near to which I captured my specimen. I believe M. laevigata ^HNS is identical with Oecophthora pusilla ^HNS, the HouseAnt of Madeira.