Part IV of Volume III provides keys for 20 subfamilies of braconids covering 1700 species belonging to 165 genera: 123 species have been described for the first time. Besides species reported for the European part of the USSR, the Keys..... includes species known from Western Europe, Kazakhstan, Soviet Central Asia and the Caucasus. For all the species, information is provided on their geographic distribution, host-plants (if available) and synonymy. The ...