170 



HALF HOUES WITH INSECTS. [Packard. 



during July. Upon hatching, the young larvae boi'e in under 

 the bark, and become fully grown in the autumn, spending 

 the winter under the bark, probably both in the fig. i37. 

 larva and pupa states, the beetles appearing during 

 midsummer. 



The Scale Insect, Mytilaspis pomonim (Bouche) 

 or Aspicliotiis conchiformis of different authors, 

 Fig, 137. — This, next to the borer, is by far the 

 most prevalent and destructive enemy of the apple 

 tree. The scale surrounds' the body of the female, 

 while the male is two-winged and flies about ac- 

 tively. It closely resembles the Pine scale insect 

 figured on page 39. The female lays her eggs 

 (Fig. 138, 1) in August under the scale protecting 

 her body, and the young (2) hatch out in June, 

 when they may be found running over the bark. 

 By the middle or last of the month they become 

 anchored by their long hair-like beak, and the S'^ie insect, 

 day after, as Riley states, a white waxy secretion 

 begins to issue from the body, as seen in 3. During a 

 period from the 6th to the middle of July, the larva loses 



Fig. 138. 



Apple Scale Insect. 



its legs and feelers and assumes the form of the adult female 

 (5). Soon after the insect moults, and its cast skin remains 



10 



