Abbas Mohammadi-Khoramabadi - Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P. O. Box: ۱۴۱۱۵-۳۳۶. Tehran, I. R. Iran.
Ali Asghar Talebi - Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P. O. Box: ۱۴۱۱۵-۳۳۶. Tehran, I. R. Iran.
Kees Zwakhals - Dr. Dreeslaan ۲۰۴, ۴۲۴۱ CM Arkel, Netherlands, E-Mail: keeszwakhals@yahoo.com.

The fauna of the subfamily Diplazontinae (Hymenoptera: Ichneumonidae) in the north central parts of Iran was studied during ۲۰۱۰-۲۰۱۱. A total of ۹۳۳ specimens were collected in ۳۰ localities at different altitudes using Malaise traps. Sixteen species belonging to ۷ genera were identified of which twelve species indicated by asterisk, are new records for Iran: Diplazon annulatus (Gravenhorst)*, Diplazon laetatorius (Fabricius),D. pectoratorius (Gravenhorst)*, D. tibiatorius (Thunberg)*, Enizemum ornatum (Gravenhorst), Homotropus nigritarsus (Gravenhorst)*, Homotropus pictus (Gravenhorst)*, Promethes sulcator (Gravenhorst), Sussaba flavipes (Lucas)*, Sussaba pulchella (Holmgren)*, Syrphoctonus tarsatorius (Panzer)*, Syrphophilus bizonarius (Gravenhorst)*, Tymmophorus obscuripes (Holmgren)*, Woldstedtius biguttatus (Gravenhorst), Woldstedtius citropectoralis (Schmiedeknecht)* and Xestopelta gracilima (Schmiedeknekht)*. Detailed morphological characters and a key to the genera and species are provided. Flight periods and distribution in relation to altitude on two slopes of the Alborz mountains are discussed.

Ichneumonidae, Diplazontinae, Taxonomy, new record, identification key, Iran