Abstract: The wingbeat patterns and frequencies of insects tethered for flying were studied by PFS-1 strobotac and computer system. Fifty selected species belonging to 20 families, 8 orders were tested; the results showed that according to the movement of the fore-and hind-wings with regavd to the amplitude and frequency of wingbeating, the patterns may be divided into 3 main kinds and 7 types. Wingbeat frequency was closely related to the wing load and the development level of thorax muscles.

Key words: insects tethered for flying, wingbeat pattern, wingbeat frequency