PLATE VIII. 



FiG3. 1-2. Nests of Ammophila ui'naria, % natural size. 



Figs. 3-4. Nests of Ammophila urnaria, natural size. 



Fig. 5. Caterpillar with egg of Ammophila urnaria. 



Fig. 6. Nest of Cerceris nigrescens, tunnel 33^ inches long. 



Fig. 7. Nest of Oxgbelus quadrinofafus, natural size. 



Fig. 8. Side view of spider: A, nervous system. (After Emerton.) 



