Figs. 1, 2, 3. _Formica sanguinea Latr._: male, female, and worker. The
host of _Lomechusa_ (p. 89), also a slave-making species; makes
irregular nests of dead leaves, etc., generally against a sloping bank.
Figs. 4, 5. _Mutilla europaea Linn._: male and female. One of the few
British species of Aculeates where the female is wingless; found in
sandy places running in the sun.
Fig. 6. _Cerceris arenaria L._: female; burrows in the sand, and
provisions its nest with beetles (p. 20).
Fig. 7. _Ammophila sabulosa L._: female; burrows in the sand,
provisions its nest with caterpillars, peculiar for its very elongated
waist (p. 22).
Fig. 8. _Crabro cribrarius L._: male; peculiar for its paddle-like
tibiae and flattened antennae (p. 103).
Fig. 9. _Odynerus spinipes L._: male; peculiar for the form of its
middle femora, which are cut out almost in two semicircles (p. 101);
female makes a tubular entrance to her nest (p. 25).