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494 THE INSECT WORLD. 
hermetically seal with their head and thorax. It is a species 
of pitfall which sets itself in motion the moment anything 
endeavours to pass it. The unfortunate who ventures is pre- 
cipitated into the well, and the C%cindela forthwith devours 
it. These habits remind one of those of the Ant-lion. When 
the time arrives for the metamorphosis, the larva of the Cicindela 
increases in size at the bottom of its hole, and stops up the 
entrance with earth before changing. The pupa (Figs. 532, 533) 
is of a pale glossy yellow, covered with small spikes. The meta- 
morphosis takes place between August and October; the perfect 
insect emerges in spring. 
Nearly akin to the Cicin- 
delas are the Megacephalas 
(Figs. 534, 535, 536), from 
Africa and tropical America } 
the Manticoras (Fig. 6587), 
which are distinguished by their robust and thick-set appearance ; 

Fig. 536.—Megacephala bifasciata. 

Fig. 537.—Manticora tuberculosa, Fig. 538.—Pogonostoma gracilis. 
the Pogonostomas (Fig. 538), which live in Madagascar; the 



