298 
COMPARATIVE ZOOLOGY. 
The mandibles are well developed, and the integument 
generally is hard. The legs are strong, for the Beetles 
are among the most powerful running Insects. The lar¬ 
vae are w r orm-like, and the pupa is motionless. The high¬ 
est tribes are carnivorous. The most prominent forms 
Fi«. 26S.—Sexton Beetles (Necrophorus vespillo ), with larva and nymph. They are 
burying a mouse, preparatory to laying their eggs in it., 
are the savage but beautiful Tiger Beetles (Cicindela ); 
the common Ground Beetles (Carabus), whose hind wings 
are often absent; the Diving Beetles ( Dytiscus ), with 
boat-shaped body, and hind legs changed into oars; the 
Carrion Beetles (. Silpha ), distinguished by their black, flat 
