122 NATURAL HISTORY OF 



bilobed, by the tooth in the middle of the mentum 

 being entire at its apex, and by the joints of the 

 anterior tarsi being dilated in the males. The an- 

 tennae are nearly filiform, or become gradually some- 

 what more slender towards the outer extremity. 

 The external palpi terminate in a joint considerably 

 wider than the others, and forming a kind of trian- 

 gle. The thorax is heart-shaped and truncated, 

 the mandibles have a single tooth at their base, and 

 the wings are not adapted for flight. In a few very 

 large and remarkable European species the anterior 

 tarsi have been found to present no appreciable dif- 

 ference in the two sexes, and these have accordingly 

 been formed into a distinct genus under the name 

 of Procerus. The latter are among the largest 

 carabideous insects with which we are acquainted. 

 They are of a uniform black colour on the under 

 parts of the body, but tinged with green or blue 

 above. They seem chiefly to inhabit the moun- 

 tainous districts of the eastern and southern parts 

 of Europe, the Caucasus, and Asia Minor. The 

 species represented is 



PROCERUS TAURICUS. 



PLATE I. Fig. 3. 



Carabus Tauricus, Pallas — Carabus scabrosus, Fisher, 

 Enlomographie de la Russie. 



This fine insect is little short of two inches in 



