COLEOPTERA. 
387 
preceding in the manner in which the elytra are terminated ; but the 
two anterior tarsi alone are dilated in the males, without however 
forming a square or orbicular palette; sometimes the three first 
joints are much wider, and in this case the succeeding one is always 
smaller than its antecedent ; sometimes the latter and the two pre- 
ceding ones are larger, almost equal, and in the form of a reversed 
heart or triangular : the first joints of the four following tarsi are 
more slender and elongated, almost cylindrical, or in the form of an 
elongated and reversed cone. 
In some, the hooks of the tarsi are simple or not dentated. 
Here the third joint of the antennae is, at most, double the length 
of the preceding one. The feet are generally robust, the thighs thick 
and more or less oval ; the thorax measured in its greatest transversal 
diameter is as wide as the elytra. 
Sometimes the mandibles are evidently shorter than the head, not 
projecting beyond the labrum at most more than half their length. 
We will begin with those in which the exterior palpi are filiform. 
Zabrus, Clairv. Bon . — Pelob, Bon. 
Distinguished from the following by the last joint of the maxillary 
palpi, which is evidently shorter than the preceding one, and by the 
two spines which terminate the two anterior tibiae *. 
PoGONUS, Zieg. Dej. 
The Pogoni, which in a natural order appear to us to be closely 
allied to the Amarce of Bonelli, are removed from the other Carabici 
the others on account of its exterior palpi, all of which are terminated by a securi- 
form joint. The first is similarly distinguished, inasmuch as the termination of the 
labial palpi of the males is the same. The Omaseus viridicollis of MacLeay — Annul. 
Javan. — is congeneric. In the genera Catadromus and Lest kits, the last joint of the 
same palpi is, however, slightly securiform, or becomes gradually thickened towards 
the extremity. The intermediate lobe of the mentum projects and almost in a point 
in the first, and is but slightly elongated and almost truncated in the second, which, 
like the preceding, consists of Insects proper to India. The last joint of the labial 
palpi in Distrigus and Abacetus is almost cylindrical. The intermediate lobe of the 
emargination of the mentum is almost null in the former ; in the latter it is very ap- 
parent and rounded. These Carabici are, as yet, foreign to Europe and America, 
The Scarite hottentot of Olivier, which we have placed in the subgenus Feronia, 
is removed from the species that formed the genus Steropus, by its intermediate tibiae 
which are strongly arcuated. It is from this character that Count Dejean has 
separated this insect from the Feroniae, and formed the genus Camptoscelis. The 
last joint of the exterior palpi being strongly securiform in Myas, that genus should 
also be distinguished from the Feroniae. 
Count Dejean has observed that in the genus Pelor, of Bonelli, the tooth of the 
middle of the emargination of the mentum is bifid, while it is entire in Zabrus. He 
retains, as we have already stated, his genus Amara, but if the characters assigned 
to it be compared with those of the Feroniae, the slightness of this generic distinction 
will soon be perceived. The last joint of the palpi of the Amarae is slightly oval ; it 
is cylindrical or slightly securiform in the Feroniae. His genus Tefragonvderus differs 
but very little from that of Amara. The tooth in the middle of the emargination of 
the mentum is truncated and entire, or without a fissure. 
*■ Carabus gibbus, Fab. ; Labrus gibbus, Clairv., Eutom, Helv., II. xi. For the 
other species, see Catalogue, &c. of Dcjean, and the third volume of his Species, 
Gener., &c. The apterous species, such as the Elajis spinipcs, Fab. ; Panz. Faun. 
Insect. German., XCVI, 2, form the genus Pelor. 
c c 2 
