During a study of saproxylic Diptera and Coleoptera, 26 species of Sphaeroceridae (lesser dung flies) have been collected in the Forest Reserve Sihlwald (Kt. Zurich, Switzerland). Most species were caught in spring and early summer. Emergence traps yielded significantly higher numbers of both species and individuals than trunk-window traps. Comparing our species list with lists obtained in other studies, a few more sphaerocerid records can be expected in the Sihlwald.