ORDER COLEOPTERA. 46l 



entirely uncovered, large, ciliated, and quadridenticulated. 

 Their mandibles are robust, in the form of an elongated 

 triangle, with two teeth at the internal edge. The two 

 maxillary lobes are coriaceous and unarmed. The body is 

 narrow, elongated, almost cylindrical, with the corslet, lon- 

 gitudinal, separated from the abdomen by a deep strangula- 

 tion. The abdomen is elongated, and the anterior legs 

 broad, digitate, and provided at the end of the spur, with 

 a silky tooth at the end. The thighs have a lenticular 

 form, and the anterior ones are larger. The anterior ex- 

 tremity of the head presents a transverse range of little 

 tubercles.* 



Others have eleven articulations on the antennas. -|- 

 Some are distinguished from all the others by the knob 

 being in a reversed cone, and composed of articulations or 

 leaves, turned in the manner of a funnel, and emboxed con- 

 centrically, and by their mandibles, entirely denticulated 

 like a saw on the internal side, and presenting underneath, 

 especially in the males, a sort of advancement or horn. The 

 corslet is very much emarginated in front in these indivi- 

 duals, with the anterior angles very much prolonged forwards. 

 The abdomen is very short, almost semi-circular, and the 

 last feet are but very little removed from its extremily. The 

 labial palpi are a little longer than the others, with the se- 

 cond articulation elongated, and the other two almost of 

 equal length. The jaws are provided internally with hairs 

 and lashes, in the form of small spines ; their terminal lobe 



* Sinodendron digitatum. Fab. ; Chiron digitatiis, Macl. Hor. Entom. I. 

 Part I. p. 107 J Diasomus digitatus, Dalm. Ephem. Entom. I. p. 4. 



■j- This computation is sometimes doubtful, seeing that it is not always 

 easy to distinguish the articulation which precedes the knob, and that it 

 may in appearance be confounded with the first of this knob. The base 

 of the second also forms a sort of knot, or rotula, which might be taken 

 for an articulation. 



