182 
BRITISH BEETLES. 
Harlequin, occurs beneath bark ; where its larva, dark 
pink and spotted in front (figured by Ratzeburg, For- 
stins., vol. i., p. 35, pi. 1, f. 7; and by M. Perris, Ann. 
de la Soc. Ent. de Fr., 1854), preys upon othor wood- 
feeding larvae. Opilus is found iu old hedges and 
posts, its soft, palo pink, hairy larva living under 
the bark of willows, and feeding on the larvae of 
Anobium, &c. ; and the species of Trichodes (of 
doubtful British origin), large, hairy, blue, red-banded 
insects, are parasitic in their earlier stages upon honey 
and mason-bees, whose larvae they devour. Corynef.es 
and Necrobia, small, flattisli, shining, and blue-black, 
with the thorax or logs rod in some instances, frequent 
dry skins, dead carcases, &c. (having even been 
found in an Egyptian mummy) ; the latter is dis- 
tinguished by the more elongate apical joint of its 
palpi, and the larger and Batter club to its antennae. 
The Limexylonidj; ( Xylotrogi , Latr.) aro very long, 
narrow, and cylindrical, with the head free from the 
prothorax, contracted bohind, and having a neck ; the 
front and middle coxae close together, large, long, cy- 
lindrical, and not exserted ; the posterior pair being 
oblique; the prosternum not produced into a point 
behind ; the spurs of the tibiae imperfectly developed 
or absent; the legs long and thin, with slender five- 
jointed tarsi ; the labrum small, but distinct ; and 
the palpi considerably developed in the males. 
Their larvae, which boro neat round drills horizon- 
tally into solid timber, ai'o elongate, cylindrical, re- 
curved behind, smooth, but with numerous rough- 
nesses on the front of the body, and a projection on 
the back of the apical segment ; their head is retractile 
into the first thoracic segment, which is enlarged and 
