Introduction of some Entomobryidae species (Collembola) from different Caspian regions

The family Entomobryidae is a group of Collembola which is also called «slender springtails». They are considered as a group of springtails characterized as having an enlarged fourth abdominal segment and a well-developed furcula. Fourth segmented antenna always is present. The species in this family may be heavily scaled and can be very colorful. They can be found throughout the world in a wide range of habitats but most species live in leaf litter، on the soil surface، under the bark of trees، in the forest canopy or in caves. In order to investigate the fauna of the Entomobryidae، different soil samples were taken from leaf litter in Caspian regions located in Mazandaran province (orchards، agricultural crops and forests). The Collembola specimens were extracted by heat in Berlise funnel during 1388-1390. Furthermore، some specimens were caught by pitfall traps. In general، five genera and five species were collected among which three species (indicated by *) were new for Iran. The specimens belonging to the genus Lepidocyrtus (Bourlet، 1839) were not matched with available taxonomic keys. The identified species were as follows: Entomobrya atrocincta *، E. multifasciata*، Seria domestica*، Heteromurus major، Pseudosinella octopunctata.