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In Iran, 4 genera and 27 species are recorded of the Thysanoptera tribe Haplothripini (Phlaeothripidae, Phlaeothripinae): Dolicholepta Priesner with 1 species, Haplothrips Amyot and Serville with 23 species, Neoheegeria Schmutz with 2 species, and Plicothrips Bhatti with 1 species. Identification keys are provided to these taxa. Three new synonyms are established: H. inoptatus Priesner is a junior synonym of H. globiceps Bagnall, H. iraniensis Priesner is a junior synonym of H. maroccanus Priesner, and H. scythicus Knechtel is a junior synonym of H. leucanthemi (Schrank). Reports of H. cerealis Priesner from Iran are considered to be misidentifications of H. tritici Kurdjumov, and comments are made on the identity of several predatory species related to H. subtilissimus (Haliday) and H. globiceps Bagnall. Several character states used for recognizing taxa in Haplothrips are discussed, and available biological data for each species are presented.

In Iran, as a result of recent changes in nomenclature 201 species and one species group of the insect Order Thysanoptera, are here listed in 70 genera and five families. In considering species listed previously from this country, the presence of 7 species is considered not confirmed, and 12 species are excluded from the Iranian list. Problems in the study of Iranian Thysanoptera are discussed briefly.

Problems in character state definition and interpretation in the Haplothrips-group are discussed, together with their implications for species identification and systematics. As a result, Neoheegeria Schmutz, 1909 is redefined to include only those species in this group that have three sensoria on the third antennal segment. The subgenus Haplothrips (Gigaplothrips) Priesner, 1949 is synonymised with Neoheegeria, and four species are recognized as valid; N. dalmatica Schmutz, 1909, N. gigantea (Priesner, 1934) comb.n., N. persica Priesner, 1954, and N. sinaitica Priesner, 1934. Three new synonyms are recognized under N. dalmatica; N. ballotae Priesner, 1951, N. hamanni Priesner, 1961 and N. nevskyi Moulton, 1946, and this species is widely distributed in the southern Palearctic. In contrast, N. persica and N. sinaitica are known only from Iran and Egypt respectively, and N. gigantea from Egypt to Morocco. The following six new combinations involve species with less than three sensoria on the third antennal segment:

Hindsiothrips sisakhti sp. n. is described from leaf litter in Iran, this being the first record of the genus from this country. A key is provided to the seven Phlaeothripinae genera recorded from Iran that are considered members of the Phlaeothrips-lineage, in which most species are fungus feeding: Aleurodothrips, Hindsiothrips, Hoplandrothrips, Hoplothrips, Idiothrips, Phlaeothrips and Stictothrips. Structural variation in the group is discussed briefly, and Idiothrips ficus Bhatti is considered a new synonym of Idiothrips bellus Faure.