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Trans. Acad, Sci. of St. Louis 
EXPLANATION OF PLATE 
PLaTe XXIII 
The tunnel of Cerceris raui (one-fourth natural size). 
Cerceris raui leaving her burrow. 
The prey of Cerceris raui; Thecesternus humeralis and Lixus 
concavus, 
All that remained of the beetles after the feast. 
The cuckoo parasite, Hedychrum violaceum. 
