ILLUSTRATIONS 



FIG. PAGE 



1. Nest of the potter- wasp, Eumenes sp v 



2. An attractive area for digger-wasps 10 



3. The burrows of Bembix nubilipennis 21 



4. Bembix nubilipennis filling her burrow 28 



5. Diagram showing the method of Bembix nubili- 



pennis in sweeping the ground 31 



6. The cocoons of Bembix nubilipennis 35 



7. The burrow of Microbenibix monodonta 40 



8. A sandy area where Microbembix monodonta and 



Bicyrtes quadrij asciata abound 43 



9. Pompiloides tropicus transporting her prey 49 



10. The burrow of Pompiloides tropicus 53 



11. Another form of Pompiloides tropicus burrow. . . 56 



12. Pompiloides marginatus dragging her prey up-hill 61 



13. The burrow and prey of Psammochares scelestus. 65 



14. Priocnemis pompilus carrying her spider 76 



15. Figure of female Arachnophoctonus ferrugineus. 79 



1 6. The twin-celled nests of Pscndagenia architect, 84 



17. Pseudagenia pulchripennis and her prey 85 



1 8. The nests of Pseudagenia mellipes in the walls of 



a Sceliphron nest 86 



19. A three-celled nest of Pseudagenia mellipes, and 



its maker 87 



2OA. The mud cells of Pseudagenia, from which 



Sphaerophthalma scaeva emerged 88 



2OB. A mud nest of P. mellipes built in an oak-apple. . 89 



21. The burrow and cells of Hypocrabro stirpicolus. . 91 



Xlll 



