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A fine series of workers of all sizes from a single colony taken at Ngayu (Lang and Chapin). "They appeared during the night, apparently attracted by some bones of large mammals, which they completely covered." The sides of the head of the largest workers are less convex than indicated by Santschi's figure and like that which he gives of D. emeryi HNS , though slightly narrower and much more deeply excavated behind. The preapical tooth of the mandibles is lacking in the largest, though present in the mediae and smallest workers. There are also three workers from Medje, taken from the stomach of a toad (Bufo funereus).