External structure, of Aphidae, [588];

of Chrysididae, [2];

of Coleoptera, [185];

of Diptera, [439] f.;

of fleas, [523];

of Hemiptera, [534];

of Hepialus, [400];

of Hymenoptera Aculeata, [5];

of Lepidoptera, [307] f.;

of Thrips, [527]