Title: A new species of Simulium (Nevermannia) from northern Thailand (Diptera: Simuliidae)
Abstract: Simulium (Nevermannia) fangense sp. nov. is described based on the female, male, pupal and larval specimens collected from northern Thailand. This species is assigned to the feuerborni species-group of the subgenus Nevermannia, and is very similar to S. (N.) sasai (Rubtsov), but is distinguished by the medium brown scutum of the female with three longitudinal vittae, and the greater number of secondary lobules of the rectal organ in the larva.