288 INSECTS. COLEOPTERA. 



T. nobilis, Lat. Coppery or golden green, shining, with a longitu- 

 dinal furrow in the middle of the thorax, the elytra gibbous, and 



the abdomen spotted with white. Inhabits Europe, on flowers. 



Lat. Gen. ii. 123. 



TRIBE II. LUCANIDES. 



Antennae always composed of ten joints, with the leaflets of the 

 club disposed perpendicularly on the axis like a comb. 



I. Labrum either none, or concealed, or exterior, but very small; labium inserted 

 behind the chin, sometimes concealed by it, sometimes projecting, either very small 

 and entire, or large and bilobed ; antennas strongly geniculate. 



Jaws generally terminated by a membranous or coriaceous lobe, rarely armed Vith 

 horny teeth. 



1. Labium concealed by the chin or discovered, but very small and entire ; body 

 convex. 



Gen. SlNODENDRON, JSSALTJS. 



2. Labium large, always projecting beyond the chin, and in two lobes ; body con- 

 vex, at least in the males. 



Gen. LAMPRIMA, PHOLIDOTUS. 



3. Labium always projecting beyond the chifl, large, and in two lobes ; body de- 

 pressed in both sexes. 



A. Eyes divided by the lateral margins of the head. 



Gen. Luc ANUS, (including the genera Flgulus and JEgus of Macleay,) NIGI- 



DIA, DORCUS. 



B. Eyes entire. 



Gen. CERUCHUS, PLATYCERUS. 



II. Labrum always discovered, fixed and large; labium covering the chin, entire ; 

 antennas simply arched and hairy. 



Jaws horny and strongly dentated ; thorax separated from the abdomen by a stran- 

 gulation or perceptible' interval. 

 Gen. PAXYLLUS, PASSALUS. 



Gen. LUCANUS, Lat. Lin. 



Antennae of ten joints, of which the first is very long, the last 

 forming a compressed, pectinated, or dentated club ; man- 

 dibles horny, projecting, generally very large in the males ; 

 body oblong, depressed, with the thorax almost square ; no 

 apparent labrum ; labium terminated by two narrow elongat- 

 ed and downy lobes ; chin large, broad, concealing the ori- 

 gin of the jaws, which terminate in a kind of forceps. 



The insects of this genus are principally found towards evening flying around old 

 trees. Most of them are exotic. The larva is very thick, with an arched body com- 

 posed of thirteen segments. Its head is brown, scaly, with strong jaws, with which 

 it gnaws the wood ; and it has six scaly feet attached to the first three segments. 

 In the larva state the insect lives for about six years, and in this stage injures the 

 roots and wood of trees. In the perfect state it but lives till the continuance of the 

 species is secured by the deposition of the ova. 



L. cervus, Lat. The Stag-Beetle, (the male.) Black, with the 

 elytra brown ; mandibles projecting, unidentate, bifurcated at the 

 extremity. Inhabits Europe Shaw, vi. pi. 6. 



The female is much smaller than the male, from which it also differs by the man- 

 dibles being very short, the head much smaller, and not angular as in the male, and 

 by the thorax being less flattened on the sides. 



