In this paper 4 species of bat ectoparasites are recorded from the island of Sint Eustatius, Dutch Caribbean. One species of true bug (Hemiptera: Polyctenidae) as well as 3 species of bat flies (Diptera: Hippoboscidae: Streblinae) are recorded. All species are photographed. The first DNA barcodes for 3 bat ectoparasite species ( Trichobius frequens, Trichobius intermedius, and Hesperoctenes fumarius) have been posted to the BOLD database; DNA barcode sequences for a fourth species ( Megistopoda aranea) are the first from a Caribbean island.
Keywords: Chiroptera; Dutch Caribbean; Mammals; Northern Leeward Islands.