282 



LANDSCAPE GARDENING. 



trees in California and the South, has been largely dis- 

 tributed about the country, having been found in 16 of the 



I , ; ' 



FIG. 165. SAN JOSE SCALE. 



(Howard : " Insect Life, 1 ' Vol. VII., p. 235, Fig. 23.) 



45 States, and may prove a troublesome pest unless at once 

 destroyed. The perfect insect is circular in outline, of a 

 gray color, varying from ^ to -fo of an inch in diameter, 

 and generally with a black spot in the centre. It is so 

 small as to escape notice until it has increased to great 

 numbers and it propagates very rapidly. It injures plant- 

 growth in same way as the last by sucking the juices of the 



