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, which 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. EXOPHTHALMUS, Lot. HAMMIONUS, Muhfeld \. 



Elaterides with filiform palpi and antennae, pectinated from the 

 fourth joint, will compose a last subgenus, that of 



PHYLLOCERUS J. (aj 



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 terminate 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'Ame'r. 

 The genus of DIMA of M. Ziegler, a species of which, called elateroides, has been 

 figured by M. Charpentier in his Horse Entomol., 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 subgenns comprises the Elatcr 

 linearis, L., of which his mesomelas is a mere variety ; the E. borcalis, Gyll., and his 

 E. cinctu*. 



I 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 obcouical. 

 If the mandibles of the Phylloceri be similar, these exotic species must be their con. 

 genera. 



(|7 (a) Of the numerous and beautiful species of Elaterides, we will add the E. 

 arcolaltu, dorsalis, bellus, rccticoUis, obesus, erytropus, oculatus, myiys, conrexa, tnangu- 

 laris, mancus, basilaris, auripilis, abbrcriata, bisect us, ntbricollis, &c., &c. f Sec. See 

 Say's paper on Coleop. Insects, 8cc. Jour. Ac. Nat. Sc. of Philad. Ill, p. 167, et 

 seq. ENG. ED. 



