A New Species of Dialictus from Sombrero Island, Anguilla (Hymenoptera, Halictidae)

A new species of Lasioglossum Curtis subgenus Dialictus Robertson (Halictinae, Halictini) is described and figured from a series of female and males collected on Sombrero Island, Anguilla; the northernmost island of the Lesser Antilles. Lasioglossum (Dialictus) sombrerense sp. n. is distinguished from its congeners and the name made available for a forthcoming work on the arthropod diversity of Sombrero Island