PLATE X. 

 PARASITIC HYMENOPTERA. 



1. Pezomachus zonatus and nests of Spider. 



2. Pezomachus fasciatus. 



3. Trogus atropos. 



4. Rhyssa persuasoria. 



5. Rhyssa depositing eggs. 



6. Clielonus oculator (rather magnified). 

 Caterpillar of Death's Head Moth. In Middle. 



Plants : — 



Willow. Above. 



Dog-grass (Ct/nosurus). In Middle, with mud -nests of Spider. 



Wood Sorrel (^Oxalis acatosella). Below. 



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