their feet and be subsequently deposited in other trees, sometimes at 

 distances quite remote. It is ])robable that the youn^j are blown by 

 strong winds from tree to tree; and they aie carried by insects, such 

 as grasshoppers, ladybird beetles, ants, etc. The crawling "lice" 

 may be transported considerable distances on the clothing of man, 

 on vehicles, or on horses or other live stock which may be in orchards 

 for any purpose. 



The suggestion that the insect may be disseminated by means of 

 scale-infested fruit (see fig. 4) has been frequenth' made, but it is 

 the consensus of opinion among American entomologists that this 

 danger, while undoubtedly existing, is negligible. 



Fig. 4. — Baldwin apple badly iiifi'sted with the Sail Jose scale. (Original.) 



FOOD PLANTS. 



The San Jose scale infests practically all deciduous fruit trees, 

 such as apple, pear, peach, plum, etc., and also many ornamental and 

 shade trees. It is, however, seriously destructive to a much smaller 

 number than that upon which it may actually maintain its existence. 

 The following list of food plants, as compiled by Dr. W. E. Britton,*' 

 includes those that are commonly or badly infested: 



a Report of the Connecticut Agricultural Experiment Station, 1902, Part IT, 2(1 

 Report of the Entomologist, pp. 132-138. 

 [(Mr. 1241 



