BIHAREAN BIOLOGIST 5(2): pp.162-163 ©Biharean Biologist, Oradea, Romania, 2011 Article No.: 111205 http://biologie-oradea.xhost.ro/BihBiol/index.html Hybrizon buccatus (de Brebisson, 1825), the first record of the subfamily Hybrizontinae (Hymenoptera: Ichneumonidae) from northern Iran Abbas MOHAMMADI-KHORAMABADI, Ali Asghar TALEBI* and Samira FARAHANI Department of Agricultural Entomology, Faculty of Agriculture, Tarbiat Modares University, P.O. Box: 14115-336, Tehran, Iran * Corresponding author: A.A. Talebi, E-mail: talebia@modares.ac.ir Received: 13. February 2011 / Accepted: 11. August 2011 / Available online: 12. August 2011 Abstract. Hybrizon buccatus (de Brebisson, 1825) is newly recorded from Iran, as the first member of the subfamily Hybrizontinae (Hymenoptera: Ichneumonidae). This species has been collected from different locations in Northern Iran. Diagnostic characters and geographical distribution of the species are briefly discussed. Key words: Hybrizon buccatus, Hybrizontinae, new record, Iran. The taxonomic status of the small subfamily Hybrizontinae Achterberg, 1976 had been the matter of several debates for a long time (van Achterberg 1999). It was traditionally in- cluded in the family Braconidae Nees, 1812 due to lack of forewing transverse vein 2m-cu in extant genera (Donisthorpe & Wilkinson 1930, Watanabe 1935, van Achterberg 1976, Watanabe 1984). Some authors treated this group either as family Paxylommatidae (Mason 1981, Tobias 1988) or as subfamily Paxilommatinae of the family Ichneu- monidae (Perrichot et al. 2009). Evidences from structure of the second and third metasomal tergites and the venation of the hind wing (Sharkey & Wahl 1987, Sharkey & Wahl 1992), and insights from the sequence of D2 variable region of the nuclear 28S rDNA gene (Belshaw et al. 1998, Quicke et al. 1999) confirmed the placement of Hybrizontinae as a sub- family of Ichneumonidae (Ronquist 1999). Despite of the unique structure of sensillae (MP sensillae without encircling groove) in the Ichneumonoidea, Basibuyuk and Quicke (1999) mentioned that Hybrizontinae is undoubtedly a small subfamily of Ichneumonidae. The subfamily Hybrizontinae include three fossil genera (Chilarovites Kasparyan, 1988; Tobiasites Kasparyan, 1988 and Paxylommites Kasparyan, 1988) and three extant genera (Eu- rypterna Foerster, 1862; Ghilaromma Tobias, 1988; and Hybri- zon Fallen, 1813) (van Achterberg 1999). The genus Hybrizon Fallen, 1813 comprises seven valid species worldwide (five species in Palaearctic Region and two in Nearctic Region; van Achterberg 1999). 16 malaise traps were used for surveying the species di- versity of parasitoid wasps of the family Ichneumonidae (In- secta: Hymenoptera) in northern Iran. The traps were placed in different ecosystems, latitudes, and altitudes. The speci- mens were extracted from the traps and sorted weekly. The collected specimens were dehydrated and mounted on cards. Identifications were made using reliable keys and comparing with the original descriptions (Tobias 1988, van Achterberg 1999). The morphological terminology follows van Achterberg (1999). The specimens are deposited in the insect collection of Department of Entomology, Tarbiat Mo- dares University, Tehran. Hybrizon buccatus (de Brebisson, 1825) (Fig. 1.1) is re- corded from Iran for the first time. Material examined: Shahrestanak - Alborz province, (N: 35°57’583" E: 51°22’329”, 2305m asl), 2♀ 22.VI.2010, 1♀ 29.VI.2010, 1♀ 6.VII.2010, 1♀ 13.VII.2010; Ziaz - Guilan prov- ince (N: 36°52’574”, E: 50°13’290“, 537m asl.), 1 ♂ 12.VII.2010; Eshmankamachal- Guilan province (N: 37°21’175”, E: 49°57’936”, 2m asl), 1♀ 19.VII.2010, 1♀ 16.VIII.2010, 1♀ 29.VIII.2010, 1♀ 11.X.2010. Figure 1. 1- H. buccatus, ♀; 2- hind leg, tibia and tarsus; 3- antenna; 4- fore wing. Diagnosis: length of fore wing 2.9 mm, basal cell with 13 setae (less than 15 setae), vein r issued close to base of pterostigma, vein 1-M paler than vein 2-CU1 (Fig. 1.4); mesoscutum with pair of bands of distinct punctures, rarely punctures largely absent or obsolescent; scapus somewhat smaller than pedicellus (Fig. 1.3); scutellum (except some- times laterally) and notaulic area of mesoscutum usually dark brown; propodeum largely smooth or granulate, except for medial carina; hind tibia and basitarsus sub-cylindrical, hind basitarsus about 1.5 times as width of second hind tar- sal segment (Fig. 1.2). The biology of Hybrizontinae is poorly known. The lar- vae of these parasitic wasps live in ant nests and develop as endoparasitoid of ant larvae (Donisthorpe & Wilkinson 1930,