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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 , 
Entomographie de la Russie. 
This fine insect is little short of two inches in 
