Monomorium (Parholcomyrmex) gracillimum (F. Smith) subspecies robustius Forel ^HNS

Several workers from Yakuluku (Lang and Chapin); found living in small mushroom-shaped termitaria. The typical form of the species is widely distributed in Asia Minor, Arabia, Central Asia, India, etc., and is evidently spreading to other parts of the Old World tropics (Africa, Java, Laysan, etc.). According to Emery, it occurs in the desert of Algiers, nesting under stones. The subspecies robustius ^HNS was originally described from Somaliland. Yakuluku is in the dry portion of the Belgian Congo towards the type locality.