INSECTA. 
376 
^he antennae is but slightly elongated. All the species known belong 
to the western world. 
Ctenodactyla Dej, 
Exterior palpi filiform, the last joint oval ; body but slightly elon- 
gated and flattened ; thorax almost cordiform, elongated, and trun- 
cated posteriorly (a). 
Agra, Fab, 
Exterior maxillary palpi filiform ; labial palpi terminated by a 
large triangular or securiform joint ; the body long and narrow ; tho- 
rax forming an elongated cone narroAved anteriorly. The mentAim 
is suborbicular with a tooth in the middle of the emargination ; the 
ligula nearly cylindrical, without very distinct paraglossae * * * § . 
Now the head is separated from the thorax by a very abrupt stran- 
gulation, in the form of a knot or patella f. The joints of the tarsi 
are entire in several, and the first are rarely dilated. The body is 
ahvavs flattened. The paraglossse are never salient, simply forming 
a membranous margin, rounded or obtuse at the end. 
Here the thorax is isometric, or longer than it is wide, cordiform, 
and truncated posteriorly. The body is elongated. Such are 
Cymindis, Lat. — Cymindis, Anomceus, Fisch. — Tarus, Clairv. 
Carabus, Fah. 
Exterior maxillary palpi filiform, or hardly thicker at the extre- 
mity, with the last joint cylindrical ; the same of the labials, larger, 
almost securiform, or like a reversed triangle, at least in the males ; 
the head not narroAved posteriorly ; all the joints of the tarsi entire 
and nearly cylindrical p 
Caeleida, Dej. 
Entirely similar to Cymindis, Avith the exception of the tarsi, the 
penultimate joint of Avhich is bifid ; in the preceding it is triangular. 
Peculiar to America. 
Demetrias, Bon. 
Analogous to Calleida in the tarsi, but having an oval head nar- 
roAved posteriorly, and all the exterior palpi nearly filiform, Avith the 
last joint almost ovoid or sub-cylindrical. 
This subgenus, as AA^ell as the next, is composed of very small 
species, Avhich usually frequent Avet places. They are, nearly all, 
European §. 
* See King’s excellent Monograph of this genus : also the Hist. Nat. Col. 
d’Eur., and the Spec, des Coleop., Dej., I. All the species belong to intratropical 
America. 
-f Somewhat narrowed posteriorly in Demetrias and Droraius, but not fixed to the 
thorax by a patella. 
X See Hist. Nat. Col. d’Eur., fascic. II, and III, and Seec. Gen. des Coleop. I, 
§ See op. cit. 
{^(a) Ctenodactyla Chevrolafii, Dej. Spec. I, p. 2‘27. The only species known 
and type of the genus. From Caynne. — E ng. Ed. 
