42 



Insect Pests. 



during the day. They are also found settled on stone walls in the 

 north of England. It is widely distributed in Britain, and in some 

 districts is very common. 



The adult occurs in May, June, July and August, and lays her 

 eggs on all manner of plants, shrubs and trees. The caterpillar 

 which is found in August, September and October is dull, greyish - 



[A. V. D. Rintoul. 

 FIG. 30. GREY TKIDENT MOTH (Acromjctd psi). 



black, with a broad, pale yellow line along the back, a large black 

 prominence on the fifth segment, and a short black one on the 

 twelfth. 



The pupa is found in a dirty grey to brown cocoon, spun in 

 crevices of the trees, or amongst moss on the ground, or on old trees. 



It is not surprising to have them recorded from apple and plum or 

 any other fruit trees, as it is well known the larvse are polyphagous. 



TREATMENT. 



Arsenical washing will kill them where they occur in sufficient 

 numbers to be dealt with. 



THE GOAT MOTH. 

 (Cossus ligniperda. Fab.) 



The Goat Moth is one of the largest of British moths, and 

 although really very common is seldom seen in its mature state. 



