PLATE XI. 



Fig. 1. Nest of Sphex ichneumonea ; tunnel 73^ inches long; pocket J^ 

 inch by % inch. 



Fig. 2. Nest of PMlanthus punctatus ; A — B, 33^^ inches; B — C, 5 inches; 

 C— D, 14 inches; D— E, 8 inches. 



Fig. 3. Nest of Astata unicolor; A— B, 2 inches; B — C, IJ^ inches; 

 A — C, 2 inches; C, four cells where the bugs were stored. B — C 

 gallery occupied by wasp while in nest. 



Fig. 4. Nest of Chlorion coeruleum; nearly % natural size. 



Fig. 5. Nest of Tachytes sp?,; tunnel 2 inches long; pocket 13^ inches 

 below surface. 



Fig. 6. Nest of Crabro stlrpicola in blackberry stem; X 2. 



Fig. 7. Bottle fastened to stem to measure work of Crabro stirpicola. 



