Two Unusual New Myrmicine Ants From Cameroon (Hymenoptera: Formicidae)

The two following ant species, both previously undescribed, were submitted to me for identification by D. McKey; they were collected during his continuing examination of Afrotropical myrmecophytes. Neither could be keyed to any myrmicine genus known to occur in sub-Saharan Africa in the keys by Bolton (1973) or H611dobler and Wilson (1990). Samples were sent to Bolton; he concurred that both were undescribed, one in the Afrotropical genus Atopomyrmex Andre (1889) and the second in the nearly cosmopolitan genus Leptothorax Mayr (1855). Since each of these exhibits peculiarities that render them unkeyable in existing generic keys, it is deemed advisable to describe them. The Afrotropical species in both genera have been recently revised by Bolton (1981, 1982).