280 SUPPLEMENT ON THE CARNIVOROUS FAMILY 



do not appear to issue forth until towards evening. The larvae / 

 of that species which is best known (^OmopJiron limhatus) in- >v 

 habit the same places where certain aquatic plants are found. 

 Its body is elongated, depressed, and of a conical form, 

 having its greatest breadth on the side of the head. It is 

 composed of a dozen rings, which are of a dirty white. The 

 head is of a trapezoid form, rusty brown colour, and presents 

 two small black eyes ; two antennae, small, setaceous, with 

 five articulations, and placed in front of these organs. The 

 mouth is formed of two strong mandibles, arched and dentic- 

 ulated. The two jaws have each two palpi, and an under 

 lip also furnished with two palpi. The first three rings have 

 each a pair of feet. These feet are scaly, directed back- 

 wards, and terminated by two sharp claws. At the end of 

 the last ring is a filiform appendage, raised, with four articu- 

 lations, the last of which finishes with two hairs. This larva 

 is very agile, and raises the posterior extremity of its body 

 like the Staphyliiii, forjiculcB^ &c. 



The Omophron limbatus is found in humid sand, under 

 stones, in the south of France, and sometimes even in the 

 neighbourhood of Paris. 



The Elaphri have a good deal of the physiognomy of 

 the clcindelcB, both in the general form of their body, their 

 colours, the projection of their eyes, and the celerity of their 

 movements. But other characters more essential appear to 

 remove them from that genus, and approximate them to those 

 carabici of the sixth section, which conduct them by shades 

 to the hydrocanthari. They are found only in humid places, 

 and on the borders of marshes and rivers. They run with 

 the most extreme rapidity, and feed on small insects, and 

 probably on aquatic larvae. Their metamorphoses have not 

 yet been observed. 



The insects of the genus Bembidion are small coleoptera, 

 which liave great relations with the elaphri, and, like them. 



