+. Art a State Sage EE y 
GRAPE DISEASE. 537 
months. In the winter it is found dormant, principally in the 
larva state, and no eggs are to be seen. ith the circulation of 
the sap in spring, the activity of these young recommences, and 
Fig. 129. 
: weil haonad healthy root; 5, i king, representing the knots and 
Pootle p by their punetures ; v as pet tusk hie. pak Aaii by them, and where the 
e, female e commenced to decay: d, d, d, shows how the lice are found on the larger roots; 
Ventral views 7 (orsal view; 7, same, ventral view: g, winged female, dorsal view; j, same, 
„EBES on roots: Magnified antenna of winged insect; j, side view of the wingless female, laying 
Sets &, shows how the punctures of the lice cause the larger roots to rot. 
a aort time afterwards eggs are deposited again. At this 
TRA li the punctures of their little beaks produce very decided 
wi “ings and an excess of moisture at the wounded parts. The 
hs m forms are by no means uncommon and commence to issue 
