.'356 



PROTECTION ACJAINST INSECTS. 



lining it with a glazed coating. The uood-nasp emerges in 

 July, by a larval-gallery, or by boring for itself a short way 

 through the wood. The flight-hole is circular (being thus 

 distinguished from those of longicorn beetles that are oval), and 



Fig. 185. — I'iue-wood Ijuini h\ lln.- hmu ui >^nr., ju 

 a Larval burrows i)artly filled with boriug-dust $. 



iiriis, L. (^Xalitnil size.') 

 y Circular flight-hole. 



about the fourth of an inch in diameter. The generation lasts 

 at least two years, and sometimes longer, the wasps appearing 

 from wood which has been worked up for some time. 



In Germany, it sometimes attacks spruce as well as Scots 

 pine, and in tlie British Isles* it has been observed on larch, 



* Miss Onacrod, aji. ctt , [jage 2.VJ. 



