PTINUS. INSECTS. 273 



P. pecticornis, Lat. Blackish, with the antennae reddish-brown, 

 and the elytra chestnut ; antennas of the female filiform and ser- 

 rated, of the male pectinated. Inhabits Europe, on trunks of 

 trees. Lat. Gen. i. 277- 



This genus includes Xyletinus of Latreille and Sandalus of Knoch. 



Gen. PTINUS, Lin. Fab. Bruchus, Geoff. 

 Body oblong ; antennae simple, inserted between the eyes, which 

 are projecting and convex ; thorax rounded, and covered in 

 the greater number with downy tubercles ; tarsi with five 

 joints, of which the first is the longest. 



P. fur, Lin. Body brown ; antennae as long as the body ; thorax 

 quadridentate ; elytra brown, striated, with two white transverse 

 bands. 1^ line long. Inhabits Europe. Shaw, vi. pi. 9. 

 The larvae of this species commit great devastations in museums, destroying the 



skins of quadrupeds, birds, &c. 



P. imperialis, Fab. With two spots on the elytra, representing to- 

 gether the rude figure of an eagle with two heads. Inhabits Eu- 

 rope, in old wood. Lat. Reg. An. iii. 248. 



Gen. GIBBIUM, Scop. Lat. Ptinus, Fab. 

 Antennae setaceous, inserted before the eyes, composed of cy- 

 lindrical joints, of which the second and two following are 

 thicker than the others ; thorax cylindrical, short, narrower 

 than the abdomen and dilated in the middle ; elytra connate. 



G. Scotias, Lat. Antennae shorter than the body ; head and thorax 

 of a shining reddish-brown ; feet covered with a cinereous down. 

 Inhabits Europe. Lat. Gen. i. pi. 8, fig. 4. 



FAMILY IV. CLAVICORNES. 



Four palpi ; elytra covering the greater part of the abdomen 

 above ; antennae generally of eleven joints, thickening insen- 

 sibly towards their extremity, or terminating in knobs of va- 

 rious forms, and always longer than the maxillary palpi ; 

 tarsi with five joints. 



This family may be divided into such as live on land, and those which inhabit 

 marshy places or water. The first five tribes belong to the first division, the sixth 

 to the second. 



TRIBE I HYSTEROIDA. 



Head sunk posteriorly in the thorax ; mandibles strong, pro- 

 jecting, with the extremity prolonged into a point; elytra 

 truncated ; feet contractile ; body generally of a square form. 



Gen. HOLOLEPTA, Paykull, Hister, Lin. 



Body much flattened, with the chin deeply notched ; the exte- 

 rior lobe of the jaws and their palpi elongated, and the joints 

 of the palpi cylindrical ; pre-sternum not covering the mouth. 



H. unicolor, Lat. Shining black ; exterior side of the first two legs 

 with three dentations ; two striae on each side of the thorax, and 



VOL II. S 



