coleoptera. 
429 
E. ferrugineus, L. ; Oliv., Ib., Ill, 35. Ten lines in length; 
black; the thorax, its posterior margin excepted, and the elytra 
deep blood-red. On the Willow. The largest species in Eu- 
rope *. 
Sometimes the head is free posteriorly, or is not sunk to the 
eyes, Avhich are protuberant and globular. The antennae are 
inserted under the edge of a frontal projection, depressed and 
arcuated anteriorly. The body is long and narrow, or nearly linear. 
Such are those which form the subgenus 
Campylus, Fisch. — Exophthalmos, Lat. — Hammionus, Muhfeld\. 
Elaterides with filiform palpi and antennae, pectinated from the 
fourth joint, will compose a last subgenus, that of 
Phyllocerus { a ) 
Our second section, or that of the Malacodermi is divided into 
five tribes. In the first, or the Cebrionites, so named from the 
genus Cebrio of Olivier, on which all the others depend, the mandi- 
bles tei’minate in a simple or entire point, the palpi are of equal 
thickness or more slender at the extremity, the body is rounded and 
convex in some, oval or oblong, but arcuated above, and inclined 
anteriorly in others. It is usually soft and flexible ; the thorax is 
transversal, widest at base, and its lateral angles acute, or in several 
even prolonged into spines. The antennae are generally longer than 
the head and thorax. The legs are not contractile. 
Their habits are unknown. Many of them are found on plants in 
aquatic localities. They may all be united in one genus, that of 
Cebrio, Oliv. Fab. 
Some which establish a connection between this and the preceding 
* For the remaining species, see Oliv., Ib. ; Panz. Faun. Insect. Germ., and his 
Ind. Entom. ; Herbst., Col., and Palisot de Beauvois, Insect. d’Afr. et d’Aradr. 
The genus of Dima of M. Ziegler, a species of which, called elateroides, has been 
figured by M. Charpentier in his Horae Entoinol., VI, 8, presents no character by 
which I can clearly distinguish it from the preceding one. 
-f- See Fischer, Entom. Russ., II, p. 153. This subgenus comprises the Elatef 
linearis, L., of which his mesomelas is a mere variety ; the E. borealis, Gylh, and his 
E. cinctus. 
J Count Dejean having collected but a' single specimen, I could not dissect it, and 
therefore was unable to study its characters in detail. Two Insects from Java pre- 
sent a similar appearance, only here, and probably in the females, the antennae are 
simply serrated. The mandibles appeared to me to terminate in an entire or eden- 
tated point. The last joint of the palpi is somewhat larger and almost obconic.al. 
If the mandibles of the Phylloceri be similar, these exotic species must be their con- 
geners. 
(a) Of the numerous and beautiful species of Elaterides, we will add the E. 
areolatus, dorsalis, belliis, recticollis, obesus, erytropus, oculaius, tnyops, convexa, triangu- 
laris, mancus, basilaris, auripilis, abbreviata, bisectus, ruhricollis, &c., &c., &c. See 
Say’s paper on Coleop. Insects, &c. Jour. Ac. Nat. Sc. of Philad. Ill, p. 167, et 
seq. — Eng. Ed. 
