Part 3

" 2. Ammophila 22

" 3-4. Spines on the tarsi of female Ammophila 23

" 5. Tubular entrance to hole of wasp 25

" 6. Basal segments of ants 33

" 7. Rose-leaf partially eaten by bees 52

" 8. Tufted hairs of hind leg of Andrena 67

" 9. Corbicula of humble bee 67

" 10-12. Cleaning apparatus of bees 69

" 13-18. Hairs of bees, magnified 71

" 19. Tongues of bees, magnified 73

" 20. Diagram of tongue of bee 75

" 21. Stylops 77

" 22. Stylops larva in abdominal cavity of bee 78

" 23. Antennae of "Keyhole" wasps 101

" 24. Legs of male "Keyhole" wasps 101

" 25. Tibia of male Crabro cribrarius 103

" 26. Antennae of male Crabro cribrarius 103

" 27. Head of male and female Crabro clypeatus 103

" 28. Parts of the insect 133

* * * * *

{xi}

DESCRIPTION OF THE COLOURED PLATES

PLATE A

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).