with the ascent of the tree's sap, the growth of the scale begins, 

 and early in A])ril in the latitude of Washington the small, two- 

 winged, active males issue from the male scales. After mating with 



Fig. 3.— Appearance of the San Jose scale, enlarged about 4 times; to the right, on pcaeli ; to the left, on 



apple. (Original ) 



the females the males die. The females continue to grow and in 

 about a month begin the production of living young— minute, yellow, 

 oval creatures, which by very close observation may be distinguished 



fCir. 124] 



