THE SCARABAIDA. 269 
they form a rounded or egg-shaped cocoon, and undergo their 
metamorphosis into nymphs. In order to make the cocoon, they 
bring together either grains of the soil or pieces of wood and 
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THE METAMORPHOSES OF THE ROSE BEETLE (Celonia aurata). 
rubbish, and unite them together with their saliva. The principal 
types of the family of the Scarabeide, when arranged in different 
tribes, are the Cefoniide, the Glaphyride, the Melolonthide, the 
