A new species of biting midge (Diptera: Ceratopogonidae), Culicoides hildebrandoi sp. n., is described and illustrated based on female and male specimens from the states of Amazonas and Rondônia, Brazil. This new species belongs to the reticulatus species group and differs from the 24 other species of this group by the elongate slightly swollen 3(rd) palpal segment with scattered capitate sensilla but lacking a sensory pit.
Keywords: Amazonas; Brazil; Rondônia; biting midges.