84 



Figure 63. 



Gossyparia ulmi. 

 a. Female before impregnation ; b. bark covered witli male cocoons ; c. perfect male. 



body being very clearly marked. Each joint is provided with 

 glands, which secrete a waxy substance. After pairing, the body 

 becomes more rounded, the waxy secretion increases, the insect 

 remains attached to a given spot, and a thick, scaly cushion is 

 formed, the spines disappear and the surface of the bodv is smooth 

 and shining. At this stage honey dew is formed in very consider- 

 able (juantities from the excess of sap which the insect takes from 

 the tree. This is showered down upon whatever may be below 

 the branches on which the insects have located. After a short 

 time the young are produced alive, in June or July. 



After the young appear the female loosens her hold upon the 

 twigs or bark. The young are as unlike either parents as these 

 are unlike each other, though they resemble the female rat'jerthar 



