Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. Author Smith, F. text 1858 British Museum London http://antbase.org/ants/publications/8127/8127.pdf book 8127 13. Pheidole rugosa . B.M. Worker. Length 3 1/2 lines.- - Ferruginous and very pubescent: the head very large, deeply emarginate behind and with a deeply impressed central channel, extending to the anterior margin of the face; the head and thorax closely and coarsely punctured, the latter narrowed behind, and deeply strangulated between the meso- and metathorax, the latter armed with two acute spines, and obliquely truncate. Abdomen ovate; the first segment with a number of fine longitudinal carinae, which intermingle at its base, but run parallel at its apex; the following segments more faintly carinate. Hab . Ceylon.