PLATE VIII. 



FIGS. 1-2. Nesta of Ammophila urnaria, %_ natural size. 



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



FIG. 5. Caterpillar with egg of A mmophila urn aria. 



FIG. 6. Nest of Cerceris nigrescens, tunnel 3*4 inches long. 



FIG. 7. Nest of Oxgbelus quadrinotatus, natural size. 



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



