230 



FOREST ENTOMOLOGY. 



grow at the same time • but the centre one soon droops and finally 

 dies, in consequence of the centre of the shoot being entirely destroyed 



Fif;. r^25.— " l.vitdin<i " hud of Scots 'pi 

 injured III/ larvii of Hetinia turionan 



:26. — " Leadinp shout " of young Scots pine 

 iijurcd hy larva o/Retinia buoliana. 



by the larva. Fig. 226 represents a photograph taken from a two- 

 year Scots pine plant in the nursery-line. The affected shoot, which 

 contains a single larva, is lying to the 

 right, and the normal shoots are very 

 4K^r-~jr^^^|g^, ,( vigorous, but they are not shown in 

 ^|ffij£R^|nL: full length. In addition to injuries 



^HHJI^^IP^ being done in nursery-lines, we often 



" find young Scots pines and Austrian 



pines from six to ten years of age 

 very much destroyed by this species. 

 As a rule the injured shoots die, 

 but a few exceptional cases are 

 found on young trees with dis- 

 torted or deformed leading shoots, 

 accruing from the damage done by 

 this insect. 



The moth (fig. 227) is from 18 to 22 mm. wing span. The fore 

 wings are of yellowish-red colour ; the red is brightened by silvery 



27.— KetiniabuoliE 

 male ; //, female. 



