496 THE INSECT WORLD. 



trapezium. The first segment is also horny, and of a metallic green. 

 The eighth has a pair of tubercles with hooks, of which the larva 



Upper-side. 



Figs. 532, 533. Pupa of a Cicindela. 



makes use in ascending and descending its vertical hole, like a sweep 

 in a chimney. This hole (Fig. 531) is afoot or more deep. To dig it, 



Fig. 534. Tetracha Klugii. Fig. 535. Tetracha oxychiloides. 



the larva employs its mandibles and its legs in the following manner: 

 it twists itself round, loads with earth the flat surface which covers its 



