Monolepta anatolica Bezdek, 1998, a little known galerucine hitherto known only from Turkey, is reported as a new pest of some stone fruit trees (Rosaceae) such as peach [Prunus persica (L.)], almond (Amygdalus communis L.), plum (Prunus divaricata Ledeb.), and pear (Pyrus eleagrifolia Pall.) in Turkey. Surveys conducted during June-August 2005 in two selected stations in Isparta (southern Turkey), showed large M. anatolica adult population densities (over 5,000 beetles per tree), particularly on leaves of almond trees. By the end of August 2005, the level of injured almond leaves reached almost 99%, and 74% in peach leaves.