U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 104, PLATE 14 





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1. Egg of Bolboceras darlingtoni (Wallis) in cavity, made by the female just below 



the provisioned cell (dark gray). 



2. Egg of Geotrupes blackburnii blackburnii (Fabricius) in cavity, at the terminal 



end of the dung wad provisioned by the female. 



