Abstract
Drusus klapaleki Marinković-Gospodnetić, 1971, is distributed in central Bosnia and Herzegovina and it belongs to the D. bosnicus Group. In the Balkan Peninsula, the D. bosnicus Group consists of 9 taxa with allopatric distribution. This study has 2 objectives. One is to describe the morphological characters of the Drusus klapaleki larva. Another objective is to find certain morphological and ecological features to larvae of the species belonging to the D. bosnicus Group from the Balkan Peninsula.