The subgenus Meloehelea Wirth includes ectoparasitic species of biting midges that feed on the haemolymph of blister beetles (Coleoptera: Meloidae) and false blister beetles (Oedemeridae). Currently, there are 16 species in this subgenus that are known from non Neotropical regions, 10 of which occur in the Palaearctic, three in the Nearctic, two in the Holarctic and one in the Afrotropical Region. The Holarctic species A. (M.) oedemerarum was recently reported from Guatemala by Tóthová (2008). A new species from Canada, Atrichopogon (Meloehelea) ladislavi Tóthová, is described. The Patagonian species Atrichopogon (M.) chilensis is restored from synonymy, its female is redescribed and the male is described for the first time.