HEMIFPERA, 



101 



As from three to six broods mature during a season, a 

 single insect may be the mother of one hundred million 

 young from June to De- 

 cember. 



Their only way of spread- 

 ing is by being carried on 

 the feet of birds, by various 

 insects, and by the wind. 

 The purchasing of infested 

 trees may also be the means 

 of introducing the pest into 

 a locality. It attacks most 

 fruit trees, currant bushes, 

 English walnut, osage 

 orange, and numerous other 

 shrubs, which are usually 

 killed within two or three 

 years by the poison in- 

 jected into them and the loss of the sap. The greatest 



natural enemy 

 of this scale is 

 the two-spotted 

 ladybird beetle 

 brought by the 

 go vernmen t 

 agents from 

 China, the home 

 of the scale. Nu- 

 merous artificial 

 remedies, direc- 



FIQ, 110. Male San Jose scale insect enlarged about ,- /. 



fifty diameters. After Howard. tlOIlS 101 USlBg 



PIG. 109. Female San Jose scale insect 

 removed from the scale. Several 

 young are seen within. Enlarged 

 fifty diameters. After Howard. 



