ing aurelia spinatu. Three of them left it precipitately after light- 

 ing on ten or a dozen branches, which they inspected closely, till 

 one more persevering than the rest, found a single fit place of de- 

 posite, finished her work and departed. 



There are but few trees and shrubs not invaded, and the larger 

 under vines are not exempted. The younger rose and raspberry 

 bushes were frequently perforated immediately above the ground, 

 where the stock was large enough. We found no forest tree un- 

 touched, except the pine, with the whole tiribinthenate class, ex- 

 cept a few of the white cedar.* 



We see the perfection of instinct in the selection of boughs of a 

 small dimension. Those that are smaller are more tender and suc- 

 culent, affording a milder and more copious nourishment for the 

 embryo, while a larger size could not be well operated on on ac- 

 count of their larger growth and hardness. As a considerable force 

 is required to introduce the instrument, it is necessary that the fe- 

 male should grasp the whole circumference of the limb, to steady 

 herself, and concentrate her strength. If she were to attempt a 

 larger limb, her legs would be so much distended that her muscu- 

 lar power would be diminished, and she could not take a firm hold 

 with her claws. 



The punctured branches decay and die after the young have left 

 them, and we have some evidence of the injury they have received 

 before that time. The leaves becomes yellow from the failure of 

 a perfect circulation, the medium of which is cut off, or much im- 

 paired. They do not fall off immediately, unless broken by a 

 heavy wind, but hang by the bark, which is more pliant and tough- 

 er than the liburnum in which the eggs are lodged. 



The great number of dead boughs we perceive after an ascen- 

 sion, that give a chequered appearance to our groves and forests, 

 only contrast living green with dead yellow, with little or no inju- 

 ry. Old forest trees and orchards suffer but little, and some of 

 them that are very luxuriant seem to improve under the pruning 

 knife of the locust. The younger articles of the nursery, and or- 



* Cupressus Thycides. 





