Collection of aquatic insects, namely Simuliidae (Black flies)

Black flies (Simuliidae) were first collected from Vanuatu in 1903, from Port Sandwich, Malekula. Related to black flies of Fiji, they were both thought to constitute an unusual group, not related to any other black fly in the region and hence they were placed in their own subgenus - Hebridosimulium. It is now apparent that they are related to a subgenus that is widespread in the Philippines and Indonesia, namely Wallacellum, but there is nothing in between Vanuatu and those more western localities.