COLEOPTERA. 519 



Tn all the followinc; subgenera, tlie antenna; or their clubs aro lod'^'-nd in lateral cavities on the under-side of the 

 titurax. The prosternuni is always dilated like a cravat. 



Attoffenux, Latr., has the rliili of the antenna.- very larp;e, lax, and three-joiiited, and the body short and sli[<htly 

 convex. Dermexies f>i.'rra. Fab. 



Trofiodcrma, Latr., has the club of the antenna^ lax, 4-jninted, and the liody oblons;. Anfhrenu.s eloiuialns, Fab. 



^■l/////rc«;w, Geoff., has the antenna; terminated in a solid obconical mass, lod^^ed in short cavities beneath the 

 fore anL^les of the thorax. The species of tliis ^-enus are very small, living; upon llowers in the perfect state, but 

 feediri!:^: in the larva state on dried animal matters, especially preserved collections of insects. These larvai are 

 o\'al, clothed with hairs, which are sometimes denticulated, forminjif bi-ushes, tlie posterior ones being- elong;ated 

 behind like a tail. The last sldn of the larva: serves as a cocoon for the pupa. Bi/rr/n/.v rerhnsd, Linn. 



Glohlconiis, Latr., has the antenna; terminated by a solid f^lobular mass. ]\lc(jaloi)i<i rujifarsis, Latr. 



The eighth tri1)e, Birrhii, dilTcrs from the [)recedijiti; in having the feet ctitiruly contractile, tlie tihijc 

 fohliiig upon the femora, and the tarsi upon the tiblie, t>o tliat ',vhen these limbs are thus contracted 

 ami closely applied to the body, the animal aeemy absolutely di'Stitnte of feet and lifeless; the tibia: are 

 orilinarily broad and compressed, tlie body is short and convex. This tribe is coiiijiosed of the genus 



IJyrriu:s, Linn. 

 NosoiJcndrony Latr., dilfers from the rest in having- the mentuni entirely exposed, wide, larg-e, and shield-like, the 

 antenna; suddenly termin;ited in a short 3-jointed mass, The species are found wider the bark of trees. 



Jijirrhus proper, dilTers in havin,2; the mentum of the ordinary size. In some the antenna: increase gradually, or 

 terminate in an elono;ated 5 or 6-jointed mass. 5. ju//^;^a, Linn., three or four lines Ion;,-", black beneath, bronzy 

 black and silky above, with small black spots separated by paler coloured lines ; [a very common species, found in 

 the earth, and in sand-pits, &c.] 



A species with similar an ten una dilfers in hav"in;:r the fourth joint of the tarsn.s Tninute, and 

 hidden between the lubes of the third. li. slriato-punctahi.'i, DcJ. [This is the ^-enus O. 

 omorplnis, CnrtiH.] 



Another small and very hairy species has the cUdj of the antenu:e 3-iointed, {Trinodes 

 hlrlns, C\\\.) 



Others have the club of the antennae only 2-iointcd, the last lar^e and nearly i,'-lobnlar. 

 (B. erinaccus, Zeiirl., D. sctlger, lU'v^-) [These form the ^en\i5 Si/ncdhjp/a, Bilhv.] All the 

 Byrrhii are [generally found in the t^round and in sandy places. Miirmidius belongs, 

 according to Dr. Leach, to this family, but flie antenna^ are only 10-jointcd, the htst forming a club. 



Oar second section of the Clavieoriics, although very natural, is only to be distinguished by a reunion 

 of several characters. Some diifei- fi'om the other Clavicornes in havini; only nine or six joints in the 

 antenna;, in this respect approaching the next famdy. The autennre of others are 11- or 10-juinted, 

 but. sometimes they are not longer than tl;e head, forming after the third joint a sub-cylindrical, serrated 

 mass : sometimes thevare tiliform, and as long as the head and thorax, but here the tarsi are terminated 

 bv a lar2;e joint ^vith two strong hooks. Those of lleterocerus and Georyssus are only 4-jointed. 



Tlic body is generally ovoid, with the liead immersed up to the eyes in a trapezi;id;d corselet, with 

 the sides eU)vatcd, and terminated Ijehind in acute angles; the inostcrnnm dilated in front and the 

 feet imperfectly contractile. They are found in water or under stones at its edge, often buried in the 

 earth : some in the form of the antennae approach the GyrUL 



I divide this section into two trilies. 



The first tribe, Jconlhopoda, is distinguished by its flattened feet, which arc broad. n::d armed on the 

 outside ivith spines, the tarsi short and 4-jointed, with ordinary sizeil claws, ami tlic body depresNcd ; 

 the prosternum is dihated ; the antennae are ratlier longer than the head, curved, 11 -jointed, the last 

 six forming a nearly cylindrical serrated mass. This tribe is composed of a single genus, 



IJf.terocerus, Bosc. 



These insects are found in tlie ground at tlie edge of water, rushing from their retreats when the earth is shaken 

 by the feet ; the form of theirfeet allows them to dig in the ground, where they conceal themseh-es, the tarsi folding 

 back. It is here where the larvae also reside, as first observed by M. Miger. 



//. nnarglnahis, Fab., is a small (common) insect, of a silky black colour, with paler buff yariahle markings; 

 Gyllenhallhas observed that the tarsi are in reality j-jointed, the basal joint beiniz; minute. 



The second tribe, Mocrodactyla, comprises such Clavicornes as have the tibiae simple, narrowed, ^vith 

 long tarsi composed of five joints (except in Georyssus), the last joint being large, -with two strong 

 inin-ucs at the tip ; tin' body is thick and convex ; the thorax less rounded, and often with acute pos- 

 terior angles. The chief type of tliis tribe is the genus 



DiiYors, Oliv. {Parnvs, Pabr.), 

 Vtdiich is divisibl'^ as follows :— 



