COLEOPTERA. 



CAKABIDiE. 



67 



family, Procrustes coriaceus, found in France, and also, but very rarely, 

 in England: the larva resembles that of the Calosoma ; it is corneous, 

 subcylindric, and terminated by two strong curved spines, each of 

 which is furnished beneath with a smaller spine. It is about an inch 

 and a quarter long, lives under moss and in damp situations, where 

 it feeds upon snails and slugs. It is full grown in the spring, be- 

 comes a pupa at the beginning of May, in a cell which it forms in 

 the ground, and remains in that state not more than a fortnight. The 

 perfect insect also feeds upon snails. 



Dr. Heer has described and figured the larvae of the following species 

 of Carabus and of Cychrus rostratus in his Observationes JEntomolo- 

 fjicce, 1836. 



The larva of Carabus auronitens {Jig. 2. i.) is very similar to that of 



Calosoma in its general form, the mandibles sickle-shaped with a 

 strong tooth inside at the base, and the terminal segment of the 

 body armed on each side with a thick horny spine with a spur on 

 each side. The antennae are 4-jointed, as well as the maxillary palpi: 

 the eyes are simple ocelli, there being six on each side. It was 

 found on the 1st of June under a stone, and was transformed to the 

 pupa on the 3d, and to the imago on the 15th of the same month. 

 The pupa {Jig. 2. 2.) is of an ordinary form, with the abdominal seg- 

 ments rounded at the sides, and furnished on each side with a fascicle 

 of hairs; the anal segment is terminated by two conical appendages. 

 The larva; of Carabus depressus and C. hortensis are also very similar 

 to the preceding, differing chiefly in the greater or less breadth of the 

 abdominal segments, and in the greater elongation of the anal fork, 

 which are simply setulose. 



Clairville also states, that the larva of one of the species of the 

 restricted genus Carabus, which he had noticed, precisely resembled 

 that of Calosoma, figured by Reaumur. 



F 2 



