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Annals Entomological Society of America  [Vol. V, 
EXPLANATION OF PLATES. 
Cerceris psamathe, head, clypeus in front. 
Cerceris psamathe, pygidial area of female. 
Cerceris mandibularis, clypeal process, front from above. 
Cerceris clymene, clypeal process, above. 
Cerceris clypeata, clypeal process above. 
Cerceris ampla, pygidial area of male. 
Cerceris prominens, clypeal process, above. 
Cerceris chryssipe, clypeal process, above. 
Cerceris alaope, clypeal process, above. 
Cerceris finitima, pygidial area, female. 
Cerceris finitima, clypeus in front, female. 
Cerceris zelica, clypeal process, front. 
Cerceris bicornuta, clypeal process, front. 
Cerceris gnara, clypeal process, above. 
Cerceris blakei, clypeal process, above. 
Cerceris ampla, clypeal process, above. 
Cerceris compacta, clypeal process, front. 
Cerceris compar clypeal process, front. 
Cerceris nigrescens, pygidial area, female. 
Cerceris robertsoni, female, pygidial area, and clypeal process in front. 
Cerceris mandibularis, clypeal process, front from below. 
Cerceris kennicotti, head, female. 
Cerceris frontata, clypeal process, above. 
Cerceris compacta, pygidial area, male. 
Cerceris morata, clypeal process, above. 
Cerceris arelate, clypeal process, above. 
Cerceris irene, clypeal process, above. 
Cerceris halone, clypeal process, above. 
Cerceris deserta, clypeal process, above. 
Cerceris mandibularis, clypeal process, above. 
Cerceris fasciola, clypeal process, above. 
Cerceris nigrescens, clypeal process, above. 
Cerceris fasciola, pygidial area, female. 
Cerceris mandibularis, pygidial area, female. 
Cerceris fumipennis, pygidial area, male. 
Cerceris fulvipediculata, pygidial area, female. 
Cerceris firma, clypeal process, above. 
Cerceris clypeata, male, last ventral segment. 
Cerceris prominens, male, last ventral segment. 
Cerceris deserta, male, last ventral segment. 
