The ants collected by the American Museum Congo Expedition. Author Wheeler, W. M. text Bulletin of the American Museum of Natural History 1922 45 39 269 http://plazi.org:8080/dspace/handle/10199/17097 journal article 20597 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."