Cotton is one of the most important crops in Iran, and it is economically and commercially important. This crop is susceptible to attacking 96 insects and ticks, among which leafhoppers are one of the main pests of this economic product. The Cicadellide family is the largest and most diverse family of Hemiptera order, many of which are pests and, by feeding on vegetarian sap, weaken or destroy the plant, and some of them also contribute to the transmission of pathogens, especially Viruses and phytoplasms . Cotton leaves become small and thick due to the attack of this pest and in the event of severe contamination, the growth of cotton is reduced and a number of bolls fall. The characteristic of this family is the presence of one or more rows of spines in their hind tibiae. In order to identify cotton fields of leafhoppers of Kashmar, from mid-spring to late autumn 2015, sampling was done by sweeping net every five days. Samples collected Inside bottles of containing 75% alcohol and considered carefully in the laboratory and after the separation for identification by using indention keys and descriptions in valid sources for final approval to the center Agricultural and Natural Resources Research Center of Isfahan for final confirmation. In this study, five species and genus belonging to the family Cicadellidae, and the subfamilies Agaliini, Typhlocybinae and Deltocephalinae were identified and examined, the most abundant species of Asymmetrasca decedens Paoli. Species marked with the (*) mark are first reported from Khorasan Razavi province.
Asymmetrasca decedens* (Paoli, 1932), Austroagallia sinuata* (Mulsant and Rey, 1855), Orosius orientalis* (Matsumura, 1914), Psammotettix provincialis* (Ribaut, 1925), Circulifer haematoceps (Mulsant and Rey, 1855)