THE COTTONY MAPLE SCALE. 



55 



enemies, both parasitic and predaceous. It is preyed upon by 

 several of the so-called "Lady-birds," beetles belonging to the 

 Coccinellidae, which, both in the young and adult condition, 

 consume large numbers of the pest. Fig. 47 is a photograph 

 of a number of larval skins containing pupae of one of these 

 beneficial beetles, found by a correspondent upon a tree 

 which has been affected with Cottony Maple Scale, and sup- 

 posed by him to be some other form of injurious insect. 



Fig. 46. — The Cottony Maple scale. (Author's illustration.) 



Treatment: A\'e cannot rely entirely upon the natural ene- 

 mies of the Maple Scale, but should resort to some of the fol- 

 lowing expedients to free our trees of this destructive insect. 



Summer treatment, as a rule, is not practicable, for inasmuch 

 as the young are hatching during a long period, four, five or 

 six sprayings are called for, yet relief can be obtained if one has 

 city water, by spraying the scales with a strong stream. Thev 

 congregate chiefly on the under side of the branches, and a 

 small jet from the hose, if it strikes them with sufficient force, 

 will dislodge them. The larvae hatching from the eggs under 

 the scales, as the latter lie on the ground, will hardly be able 

 to reach the trees, \^^^en the young scales are hatching, a 



