192 BRITISH BEETLES. 



an oval silky cocoon, the pupa having the thorax pro- 

 duced in front into two strong projections, and the 

 abdomen ending in two double-jointed projections, with 

 several acute tubercles on the last segment beneath. 



In Orthoch&tes and Trachodes (the former found in 

 moss and the latter in old twigs or in rotten wood) the 

 scutellum and wings are absent. Both of them are set 

 with stiff bristles. 



The BARIDIAD^E have the front legs distant at the 

 base, and the breast flat. We possess but one genus, 

 Baridius, containing certain small, elongate, cylindrical 

 beetles, mostly dull in appearance, and in some cases 

 very slightly clothed with pubescence, which readily rubs 

 off. They frequent Lepidium, Reseda, etc., and super- 

 ficially resemble the species of Mecinus, which have but 

 five joints to the funiculus. 



The CiiYPTORHYNCHiDjE have the rostrum bent down- 

 wards, and received into a more or less distinct canal 

 in the under side. The anterior legs are nearly always 

 distant at the base. 



The typical genus, Crypt or hynchus, contains one 

 species, Lapathi (Plate XII, Fig. 3), not uncommon on 

 willows, into the trunk of which its larva bores, making 

 large cylindrical holes. It has been noticed that this 

 insect, when alarmed, makes a creaking noise by rubbing 

 the base of its prothorax against the front of the meso- 

 thorax. 



In Cceliodes the rostrum is received into a canal be- 

 tween the front and middle pair of legs ; its species are 

 small, convex, and " dumpy ;'- one of them, didymus, 

 a dull greenish-grey insect, variegated with white scales, 

 and having a white spot on each side of the elytra, is 

 most abundant on nettles. 



