COLEOPTERA. 483 
The genus Omophron (Fig. 510) contains small, almost globular 
Carabide of a pale yellow, with green lines, and which live in the 

Fig. 503.—Procrustes coriaceus. Fig. 509.—Procerus gigas. 
sand bordering rivers. The Medrias in general prefer moun- 

Fig. 510.—Omophron libatum. Fig. 511.—Nebria arenaria. 
tainous countries. The largest species, the Nebria arenaria 
(Fig. 511), is found all along the coast of the Mediterranean, and 
even on the western shores of France. But its colours grow paler 
if 
