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*[P. megacephala was first recorded in Bermuda in 1889, & was the most dominant ant species there in the early 20th century. When L. humile arrived in Bermuda in the 1940's, this new invader quickly overran much territory, driving back P. megacephala. However, P. megacephala persisted, & ever since, these 2 species have been contesting ever-shifting battlefronts between mutually exclusive territories that together occupy most of the land area of Bermuda. In addition to the 2 dominant ant species, 18 other ant species are known from Bermuda, though currently all are inconspicuous and/or very rare]