174 CLASS INSECTA. 



with the exception of that of the omophronta, the head is less 

 strong and more equal. The simple eyes are very small and 

 more similar to each other. The scaly piece of the first ring is 

 squared and does not edge beyond the body ; the eighth has no 

 mammellae, and the last is terminated by two conical appen- 

 dages besides a membranous tube, formed by the elongation of 

 that part of the body in which the anus is situated. These 

 appendages are corneous and dentated in the larvae of the 

 calosomi and the carabi. They are fleshy, articulated, and 

 longer in those of the harpali and licinae. The body of the 

 last but one is a little shorter, with the head a little more 

 bulky. The form of the mandibles of the one and the other 

 approaches to that which they have in the perfect insect. 

 The larva of one species of omophron, according to the ob- 

 servations of M. Desmarest, has a conical form, a large head, 

 with two very strong mandibles, and presents but two eyes. 

 The posterior extremity of the body, which is narrowed by 

 degrees, is terminated by an appendage of four articulations. 

 I have counted but two in those of the larvae of the licini and 

 harpali. 



This family has always the first stomach short and fleshy ; 

 a second elongated, and, as it were, hairy at the exterior, 

 in consequence of the numerous small vessels with which 

 it is furnished, and an intestine short and narrow. The 

 hepatic vessels, four in number, are inserted near the 

 pylorus. 



There are terrestrial and aquatic insects of this order. 



The terrestrial have feet solely proper for running, the 

 four hinder ones of which are inserted at equal distances, the 

 mandibles entirely uncovered : the piece terminating the jaws 

 is straight underneath and covered only at its extremity, and 

 most frequently the body is oblong, with the eyes projecting. 

 All their tracheae are tubular or elastic. Their intestine is 



