COLEOPTERA. 437 



In the second tribe of the Lamellicornes or the Lucanides, 

 so called from the genus Lucanus of Linnaeus, the antennal 

 club is composed of leaflets or teeth arranged perpendicularly 

 to its axis in the manner of a comb. These organs always 

 consist of ten joints^ the first of which is usually much the 

 longest. The mandibles are always corneous, most commonly 

 salient and larger, and even very different in the males. The 

 maxillae, in most of them, are terminated by a narrow, elon- 

 gated and silky lobe ; those of others are entirely corneous 

 and dentated. The ligula in the greater number is formed of 

 two small silky pencils projecting more or less beyond an 

 almost semi-circular or square mentum. The anterior legs 

 are most frequently elongated, and their tibiae dentated along 

 the whole of the outer side. The tarsi terminate by two equal 

 and simple hooks with a little appendage terminated by two 

 setae between them. The elytra cover the whole of the ab- 

 domen above. 



We will divide it into two sections, corresponding to the 

 genera Lucanus and Passalus of Olivier. 



In the first we find the antennae strongly geniculate, gla- 

 brous or but slightly pilose ; the labrum very small or con- 

 founded with the epistoma ; maxillae, terminated by a mem- 

 branous or coriaceous, very silky, penicilliform lobe without 

 teeth, or at most with but one ; and a ligula either entirely 

 concealed or incorporated with the mentum, or divided into 

 two narrow, elongated, silky lobes extending more or less be- 

 yond the mentum. The scutellum is situated between the 

 elytra. 



The first section will form the genus 



Lucanus. 



We will make a first division with those in which the antennal club 

 consists of but from three to four joints or leaflets. 



We will begin with Insects, which, with the exception of their 

 antennae, are almost entirely similar to Oryctes, a subgenus of the 



sect, I, iii, p. 126; Schoenh., Synon., I, iii, p. 112, and Lin. Trans., XIV, with 

 respect to the genera, Genuchus, Schizorhina, and Gnathocera, established at the 

 expense of that of Cetonia. 



