ORDER COLEOPTERA. 345 



posed of more than four articulations, the first of the five or- 

 dinary ones being very short, and concealed under the second. 



The insects of this subdivision compose the genus Clerus, 

 properly so called, of Geoffroy. M. Dufour admits that the 

 posterior tarsi have six articulations, but the first of which 

 is very short ; the same articulation is only rudimentary in 

 the intermediate tarsi, and nothing in the anterior two. 



Sometimes the antennae thicken insensibly, or terminate 

 gradually in a knob. The intermediate articulations, pro- 

 ceeding from the third, are almost in the form of an elongated 

 cone. The two, to the last four but one, are almost in the 

 form of a reversed triangle, and the last is ovoid. 



Thanasimus, Lat. Clerus, Fab., 



Have the maxillary palpi filiform, and the last articulation 

 of the labial large, and hatchet-formed.* 



Opilo, Lat. Notoxus, Fab., 



In which the four palpi are terminated by a large articu- 

 lation, hatchet-formed {attelahus mollis, Lin. ; Clerus mollis, 

 Oliv. ibid. 1. 10.). 



Sometimes the last three articulations of the antennae are 

 much broader than the preceding, and form an abrupt knob, 

 either simple, and in the form of a reversed triangle, or 

 serrated. 



Those in which this knob is simple, or not serrated, com- 

 pose two sub-genera. 



Clerus (Proper), Geoff". Trichodes, Fab. 



Their maxillary palpi are terminated by an articulation in 

 the form of a reversed and compressed triangle ; the last of the 



• Attelahus formicarius, Lin. ; Clerus formicariusy Oliv. Col. IV. 76. i. 

 13; Clerus mutillarius. Fab. Oliv. ibid. i. 12. 



