Engramma griseopubens, Forel, 1922

Wheeler, W. M., 1922, The ants collected by the American Museum Congo Expedition., Bulletin of the American Museum of Natural History 45, pp. 39-269: 205-206

publication ID

20597

persistent identifier

http://treatment.plazi.org/id/E6F7A668-70B3-0287-C774-F90EC35A4D44

treatment provided by

Christiana

scientific name

Engramma griseopubens
status

new species

Engramma griseopubens   HNS   , new species

Text Figure 52

Worker.- Length 2.7 mm.

Head without the mandibles slightly longer than broad, much broader behind than in front, with somewhat angularly excised posterior border and feebly convex sides. Eyes small and flat, in front of the middle of the head. Mandibles rather large, convex, their long apical margins with numerous crowded denticles. Clypeal notch semicircular, about one-fifth as broad as the anterior margin. Frontal carina1 somewhat closer together than to the lateral margins of the head. Frontal area and groove obsolete. Antennae rather slender, scapes not reaching to the posterior corners of the head; first funicular joint twice as long as broad, remaining joints except the last, as broad as long. Thorax with sharply marked premesonotal and mesoepinotal sutures, the pro- and mesonotum forming a hemispherical mass, the latter circular, the humeri rounded; the mesoepinotal constriction moderately deep, acute; the epinotum lower than the promesonotum, only a little longer than the mesonotum, broader than long, in profile rather convex, sloping, without distinct base and declivity.

Petiole of the usual shape, elliptical, with its anterior border thickened above as the vestige of the node. Fust gastric segment overlying the petiole as in the other species of the genus; anus nearly terminal. Legs rather slender.

Shining; whole body very finely and uniformly punctate.

Hairs absent, except on the mandibles and tip of the gaster, where they are very short. Pubescence gray, short and fine, rather abundant, uniformly covering the whole body, but not concealing the surface.

Black; mandibles, sides of clypeus, checks and gula brown.

Described from a single specimen taken by Lang and Chapin on fire-wood between Lukolela and Basoko. This species is quite distinct in the shape of the thorax, in sculpture, and in pilosity.

The following species, though not from the Congo, may be most conveniently described in this place.