Abstract
During the summer of 1924 the writer was engaged in research upon the feeding habits and the structure of the mouth-parts of Diptera. Among the families of Diptera that were studied were the Empidae, and one of the most interesting members of this family is Tachydromia minuta, Meigen, since it is among the few British Diptera, other than the Asilidae, that are entirely predacious.

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