426 
INSECTA. 
Lissomits, Dalm . — Lissodes, Lat. — DRAPEXEs.TJ/e^f. Dej. *. 
Others again have equally filiform antennae, but their second and 
third joints are flattened, larger than the following ones, and are 
alone received into the sternal grooves ; the tarsi are similar to those 
of Lissomus ; the head is concealed underneath, and as if covered 
by a semicircular thorax, into which it is plunged. Such is the 
Chelonarium, Fab. 
The antennae, when at rest, extend parallel to each other along the 
pectus ; the first and the fourth joint are the smallest of all ; the seven 
following ones are of the same size, and, with the exception of the 
last, which is ovoid, almost in the form of a reversed cone, and equal. 
The body is ovoid, and the anterior tibiae are wider than the others, 
All the species known are from South America f. 
The last subgenus of this first division, or 
Throscus, Lat. — Trixagus, Kugl. Gyll. — Elater, Lin. 
Is distinguished from all others of this tribe by the antennae, which 
terminate in a triarticulated club, and are lodged in a lateral and 
inferior cavity of the thorax. The penultimate joint of the tarsi is 
bifid, and the point of the mandibles entire J. 
Our second division of this tribe will include all the Elaterides 
whose antennae are exterior or exposed. 
We will separate, in the first place, those in which the last joint of 
the palpi, of the maxillaries particularly, is much larger than the 
preceding ones, and almost securiform. 
A single subgenus, the 
* Dalm., Ephem. Entom., 1824. His Lissomus punctulatus is closely allied to the 
tirapetes castaneus of Count Dejean, and the Elater Icevigatus of Fabricius. 
One species of this subgenus is found in Europe, the Elater equestris, Fab. ; Panz., 
Faun. Insect. Germ., XXXI, 21. 
N. B. Messrs. Lepelletier and Serville — Encyclop. Method., Insect., X, 594 — have 
formed a little group, with various species of Elater, composed of three genera, and 
characterized by the presence of the elongated and lobe-like pellets with which the 
inferior surface of the four first joints of the tarsi are furnished. The first of these 
genera, Lissode, or the Lissomus, Dalm., is distinguished from the two others by 
the antennae which are closely approximated at base ; in the others they are remote. 
Those of the genus Tetralobus are flabelliform in the males. In the third or 
Pericallus, they are simply serrated in both sexes. The Elater flabellicornis, Fab., 
belongs to the first, and consequently this genus is a division of that which I have 
named Hemirhipus. . The Elaterides ligneus, suturalis, furcatus, &c.. Fab., belong 
to Pericallus, which will then comprise all the species of my Ctenicera, whose 
tarsi present the general character above mentioned. 
t Fab., Syst. Eleut., I, 101 ; Lat., Gener. Crust, et Insect., I, viii, 7, and II, 
44 ; Dalm., Ephem. Entom., 1824, p. 29. This genus is also found in the southern 
section of North America, where however it is very rare. 
X Elater dermestoides, L.; E. clavicornis, Oliv., Coll. II, 31, VIII, 85, a, h; Der- 
mestes adstrictor, Fab. ; Panz., Faun. Insect. Germ. LXXV, 15 . Its larva inhabits 
oak wood. 
