ENTOMOLOGY. IM 



tion. In about ten clays, they come to their ftill 

 growth; about half the time being of a light 

 green colour, and afterwards gradually growing 

 darker, and variegated by shining black tubercles, 

 with black bristles proceeding from them.* 



When at maturity, they become lethargic, and 

 cease eating, preparatory to stripping themselves 

 of their outer skin, which they leave attached to 

 the foliage or branches of the tree, in the form of 

 a dry brown-looking slough. 



After this change, the larva assumes a bright 

 yellow colour ; and, as it is seldom seen by gar- 

 deners in this state, I believe the stripping gene- 

 rally takes place in the night, during which pe- 

 riod the insect ako betakes itself to the ground, 

 where it undergoes its other changes, and becomes 

 a perfect fly. 



At Sale, the first broods of larvae make their 

 appearance, usually, about the last week in 

 April, or the first week in May, as the season is 

 early or late ; and about the 7th or 10th of July, 

 the second brood will be seen at work, preferring 

 the young and tender midsummer shoots to the 



* See Mciuoires pour servir a L'Histoire des Insectes, par 

 Reaumur, Tom 5, pari 1, p. 119 aud 120. 



r2 



