Fig. 10.--_Colletes succinctus L._: female; lines its cells with a
gluey material (p. 44); colonizes in sandy banks; host of _Epeolus
rufipes_ (fig. 19).
{xii} Fig. 11. _Sphecodes subquadratus Smith_: female; cuckoo of a
species of _Halictus_; female hibernates like its host (p. 17).
Fig. 12. _Halictus lencozonius Schr._: burrows in the ground; the host
of _Sphecodes pilifrons Thoms_ (p. 17).
Fig. 13. _Vespa crabro L._: female (the Hornet), nests in hollow trees;
host of the rare beetle _Velleius dilatatus_ (p. 38).
Fig. 14. _Vespa vulgaris L._: female: one of our commonest wasps; nests
usually in the ground (p. 35); host of a peculiar beetle (_Metoecus
paradoxus_) (p. 38)
Figs. 15, 16. _Andrena fulva Schr._: male and female; the bee which
burrows in lawns, etc. (p. 9); host of _Nomada ruficornis var. signata_
(p. 15).
Fig. 17. _Panurgus ursinus Gmel._: Female; legs loaded with pollen,
burrows in hard sandy paths, etc. (p. 49). Males sleep curled up
amongst the rays of yellow composite flowers.
Fig. 18. _Nomada ruficornis L. var. signata_: cuckoo of _Andrena fulva_
(figs. 15 and 16).
Fig. 19. _Epeolus rufipes Thoms_: female; cuckoo of _Colletes
succinctus_ (fig. 10).