BEETLES. Ill 



of the latter, which is black. The larva lives in beech, fir, and 

 oak trees. It is very local. 



Genus Lymexylon, Fabr. 

 Pronotum longer than broad, attenuated in front. Abdomen 

 with five segments. The antennae have eleven joints, and are 

 filiform, slightly expanded in the middle. The only British 

 species is : 



* L. navale, Linn. The male is 5-9 mm. in length, with the 

 elytra at the base as far as the middle of the suture, the 

 abdomen and legs, yellow. The female averages 8-14 mm., and 

 is ochre-yellow, with the head, the margins, and tips of the 

 elytra, blackish. The larva lives in the wood of oaks. 



Family XXXI. PTINIDiE. 



Elytra covering the abdomen. Antennae with from nine to 

 eleven joints, filiform, serrated, pectinated, or with three 

 enlarged terminal joints. The prosternum has no projection 

 towards the mesosternum. The tarsi are five-jointed, the first 

 two joints being about equal. The claws are simple. The 

 beetles live in wood and dry vegetable and animal substances. 



Genus Hedobia, Ziegl. 

 Elytra cylindrical, more than half again as long as broad. 

 The antennae have eleven joints, and are longer than the body ; 

 they are filiform. The first joint is the stoutest, the second is 

 small, and the remainder are about equal in length. They 

 live on flowering shrubs and the larvae in old wood. 



* H. imperialis, Linn. (Plate XII., Eig. 1). This is a fuscous 

 species clothed with whitish down. The elytra have a waved 

 white patch, and a white spot near the extremity. The antennae 

 and legs are dull red. It lives in the old stumps of walnut, 

 hazel, beech, and damson trees, as well as in old white-thorn 

 bushes. It is widely distributed. 



