The Bibionidae (Diptera) of Sardinia, with description of two new species

The occurrence of eight species of Bibionidae is reported from Sardinia, mainly based upon recent collections made in the south-western part of the island. Two species, Dilophus bispinosus Lundström, 1913 and D. humeralis Zetterstedt, 1850, are new records for Sardinia, while two species are described as new to science: Bibio sardocyrneus sp. nov. (from Sardinia and Corsica) and Dilophus sardous sp. nov. (from Sardinia). The presence on the island of a ninth species, D. femoratus (Meigen, 1804), is considered as dubious. Finally, the following synonymy is proposed: Bibio hortulanus (Linnaeus, 1758) = Bibio siculus Loew, 1846 syn. rev.