410 INSECTA. 



niform than foliaceous, approach the Lamellicornes of the second 

 tribe, where in fact they have been placed by M. Mac Leayj but in 

 the ensemble of their other characters they belong to this section. 

 Their labium is broad, ciliate, quadridentate, and completely ex- 

 posed. Their mandibles are robust, in the form of an elongated tri- 

 angle, and have two teeth on the inner side. The two maxillary lobes 

 are coriaceous and without any kind of armature. The body is nar- 

 row, elongated, and almost cylindrical; the thorax is longitudinal 

 and separated from the abdomen by a deep strangulation; the abdo- 

 men is elongated, and the anterior tibiae are wide, digitated, and 

 furnished on the inner side, after the spur, with a tooth, silky at the 

 end. The thighs are lenticular, and the two anterior are the largest. 

 There is a transverse range of small tubercles on the anterior extre- 

 mity of the head(l). 



Those of others are composed of eleven joints(2). 



Some are distinguished from all others by the antennal club in the 

 form of a reversed cone, which consists of joints or leaflets contorted 

 into a kind of funnel and fitting concentrically into each other, and 

 by their mandibles, the inner side of which is entirely serriform, and 

 which present underneath, particularly in the males, a projection or 

 horn. In these individuals the thorax is deeply emarginated before, 

 and its angles project considerably forwards. The abdomen is very 

 short, almost semicircular, and the last legs near its extremity. The 

 labial palpi are a little longer than the others; their second joint is 

 elongated, and the two others are almost equal in length. The inner 

 side of the maxillae is furnished with h^irs and cilia, in the form of 

 little spines, and their terminal lobe is narrow and elongated. The 

 mentum is triangular, and transversely truncated at its extremity. 

 Such are those which form the 



Lethrus, Scop. Fab. 



The species, but few in number, are peculiar to Hungary and the 

 eastern part of Russia. 



L. cephalotes. Fab.; Fisch., Entomog. Russ. Imp., I, p. 133, 

 XIII, 1. This Insect, distinguished from the other species by 

 its entirely black colour, and smooth thorax and elytra, accord- 

 ing to professor Gothelf Fischer, is extremely noxious in culti- 



(1) Sinodendron digitatum, Fab.; Chiron digitatus, Mac Leay, Hor. Entom., I, 

 p. l(>7; Diasomus digitatus, Hslm., Ephem. Entom., I, p. 4. 



(2) This supputation is sometimes doubtful, inasmuch as it is not always easy to 

 distinguish the joint that precedes the club, and that it may, apparently, seem 

 confounded with the first of the club itself. The base of the second also forms a 

 sort of knot or rotulathat may be taken for a joint. 



