The parasitoid wasps of the family Ichneumonidae (Insecta: Hymenoptera) are the most species rich family of order Hymenoptera which spread in all ecosystems of the world. Some wasps of the family have night activity. The current research has been carried out to collect and identify the night-flying wasps of this family in the south of Fras and Hormozgan provinces during 2015-2016. Seven localities with different altitudes have been selected including Bandar Abbas, Forg, Jannatshahr, Darab, Layzangan, Badameh and Kouhestan. Light Pan trap was used for sampling with an interval of one night in each week. Water and some droplets of detergent were used as killing and collecting medium in pan traps. The captured specimens were collected at the morning before sunrise and then transferred to the laboratory. Individuals of the ichneumon wasps were then picked up and preserved in 70 % ethanol. Totally 676 individuals of the ichneumon wasps were collected and identified using available keys and literatures. Results showed that 23 species into 9 subfamilies of this family have night activity. Among the following identified species, six and three species are new records for the studied localities and Iran, respectively which are marked with one and two asterisks, respectively.
Subfamily Banchinae: Exetastes adpressorius Thunberg, 1822*; Subfamily Campopleginae: Diadegma majalis Gravenhorst, 1821, Diadegma fenestrale Holmgren, 1860, Diadegma maculatum Gravenhorst, 1829, Leptoperilissus persicus Horstmann, 1993; Subfamily Cremastinae: Pristomerus mesopotamicus Horstmann, 1990*, Cremastus sp., Temelucha turcata Kolarov & Beyarslan, 1999**; Subfamily Cryptinae: Gelis sp., Phygadeuon sp., Dichrogaster perlae (Doumerc, 1855)**; Subfamily Diplazontinae: Diplazon laetatorius Fabricius, 1781; Subfamily Ichneumoninae: Diadromus collaris (Gravenhorst, 1829); Subfamily Mesochorinae: Mesochorus sp.; Subfamily Ophioninae: Ophion luteus Linnaeus, 1758*, Ophion minutus Kriechbaumer, 1758, Ophion forticornis Morely, 1915**, Eremotylus boguschi Meyer, 1935*, Eremotylus pumilus Hedwing, 1957*, Enicospilus variicarpus Kokujev, 1907*; Subfamily Tryphoninae: Netelia (Paropheltes) nervulator Aubert, 1971, Netelia (Paropheltes) sp., Netelia ( Netelia) sp..