INJURIOUS INSECTS OF 1904. 



181 



the rate of four or five bushels to the acre, or lime at the rate of ten 

 or twelve bushels to the acre, applied twice in succession, will 

 be instrumental in ridding soil of them. Salt is especially injurious 

 to their mucous membrane. Fields should be dressed when slugs 

 are active after heavy rain or in early morning before the sun is up ; 

 never during the hot part of the day or in very dry weather. Salt 

 may be used sparingly in the flower garden. It should never be put 

 close to plants for obvious reasons. 



Moles in Lawn and Flower Beds: See page 163. 



COTTONY MAPLE SCALE ON ELM AND MAPLE. 



Fie;. 164. — Cottony Maple Scale, Pulvinaria innmerabilis. on Soft Maple. Original. 



Our illustration shows this insect, which has been extremely 

 abundant this year, on. soft maple. Maples and elms, as well as 

 various vines and shrubs, in St. Paul, Minneapolis. St. Anthony 

 Park and many towns throughout the state, as well as trees in 

 localities in South Dakota and elsewhere, have been more or less 

 affected. Its extreme abundance during the present season is not 

 difficult to account for, since the wonderfully rapid rate at which 



