Engramma wolfi, Forel

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 : 203-204

Engramma wolfi Forel Text Figure 50

Akenge, [[worker]], [[queen]]; Ngayu, [[worker]]; Medje, [[worker]] (Lang and Chapin); Walikale to Lubutu, [[queen]], [[male]] (J. Bequaert). Female (undescribed).- Length 4.6 to 5 mm.

Very similar to the worker. Head scarcely excavated behind. Eyes about twofifths as long as the sides of the head. Clypeal border each side of the notch flattened and angularly projecting. Head and thorax a little more finely punctate and therefore a little more shining than in the worker. Epinotum feebly convex, sloping, without distinct base and declivity. Dark brown; mandibles, antenna; and wing-insertions pale brown; legs, including the coxae, white, with a clark brown band around each femur and the tips of the hind coxae of the same color. Wings grayish hyaline, with pale brown veins and pterostigma.

Male (undescribed).-

Length nearly 3 mm.

Head through the eyes as broad as long. Eyes and ocelli large. Mandibles well developed, decussating, with long, very finely and evenly denticulate apical borders. Clypeus short, with nearly straight, entire anterior border. Antenna; long and slender; scape and all joints, except the first funicular, cylindrical; the latter as broad as long but not broader than the succeeding joints. Thorax short, not broader than the head; the mesonotum broader than long, not overhanging the pronotum. Epinotum sloping, without distinct base and declivity. Petiole with more distinct trace of the node at the anterior end than in the worker. Genitalia moderately large, exserted. Legs slender. Wing venation as in the female.

Sculpture and pilosity much as in the female, the hairs and pubescence being very sparse and short, the former apparent only on the mouth-parts and tip of the gaster.

Dark brown; front of head and three large spots on the mesonotum pale rusty brown; mandibles pale yellowish; scapes, first funicular joint, and legs, including the coxae, sordid white; the femora without brown bands. Wings and their veins a little paler than in the female.

The specimens from Akenge, Ngayu, and Medje (a female and four workers) were taken from the stomachs of toads (Bufo polycercus, superciliaris, and funereus), those from Walikale at lights. Kohl took the workers from which Forel described the species in the virgin forest in the ground among rotten leaves. This habit accounts for the occurrence of specimens in the toads' stomachs.