Diversity and Distribution Pattern of Hymenoptera Insects in Jorhat District, Assam, India

During the years 2011-2012, a survey was conducted to assess the diversity and distribution pattern of different hymenoptera insect species under the Department of Entomology, Assam Agricultural University in Jorhat district of Assam. Collections of various hymenoptera insects were made from different locations of Jorhat district viz. Kakilamukh, Titabor, Cinamora and Nimati. The areas chosen for the collection varies from farmland to forest areas with an average elevation of 116 meters (381 ft). A total of 50 surveys were conducted during the study period. The study reveals that the area under the survey has hymenopteran insects belonging to 21 families, 42 genera, and 50 species and their ecological roles span from predator to crop pollinator and parasitoids. The distribution pattern of hymenoptera insects is concerned 14 species abundant, 28 species occasional and 8 species were rare in the study site. The order of most dominant families in the district was Vespidae followed by Formicidae and Apidae.