The Glow- Worm and Other Beetles 



sides. The road is barricaded about two 

 inches down with a long plug of coarse shav- 

 ings. Next comes the nymph's cylindrical, 

 compressed apartment, which is padded with 

 woody fibres. It is continued underneath by 

 the labyrinth of the larva, the burrow 

 crammed full of digested wood. Note also 

 the complete boring of the liberating passage, 

 including the bark when there is any. 



I find Stromatium strepens in ilex-logs 

 which have been stripped of their bark. 

 There is the same method of deliverance, 

 the same passage curving gently towards the 

 nearest outside point, the same barricade of 

 shavings above the cell. Was the passage 

 also carried through the bark? The 

 stripped logs leave me ignorant as to this 

 detail. 



Clytus tropicus, a sapper of the cherry- 

 tree, C. arietis and C. arvicola, sappers of 

 the hawthorn, have a cylindrical exit-gallery, 

 with a sharp turn to it. The gallery is 

 masked on the outside by a remnant of bark 

 or wood, hardly a millimetre thick, ^ and 

 widens, not far from the surface, into a 

 nymphosls-chamber, which is divided from 

 the burrow by a mass of packed sawdust. 



To continue the subject would entail an 



* .039 inch. — Translator's Note. 

 218 



