Crematogaster impressiceps variety frontalis Santschi, 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 : 154

Crematogaster impressiceps variety frontalis Santschi , new variety

"Worker. - Length 3 to 3.5 mm. Pale brown; thorax less sculptured than in the typical impressiceps . Frontal groove deeply impressed. Stature less variable and smaller than in the typical form of the species and larger than in the variety longiscapa Stitz , but the scape also extends beyond the occiput as in that variety." (Santschi)

Numerous specimens from Malela (type locality) and Kunga (Lang, Chapin, and J. Bequaert); those at Kunga found nesting in the hollow internodes of the myrmecophyte Cuviera species (Part IV); the specimens from Malela "living in a small carton nest, about 9 cm. long, fixed upon a stalk of Raphia."