Hemirhopalum parasuturale sp. nov. from Ecuador and H. pici sp. nov. from Paraguay are described, illustrated and compared. Hemirhopalum suturale Pic, 1937 is newly synonymized (syn. nov.) with Novelsis hornii (Jayne, 1882). All the known Hemirhopalum Sharp, 1902 species are listed together with their known occurrence countries, all of them restricted to the Neotropical Region.