1906 



ENTOMOLOGICAL SOCIETY. 



51 



Fruit-tree Insects. 



The Oyster-shell 'Scale, or Bark-louse as it is usually called, (Lepido- 

 saphcs uhni) is now wide-spread on apple-trees all over Ontario and has be- 

 come through neglect a serious injury. Twigs completely encrusted with, 

 the scales have been sent in from many places, our correspondents fearing 

 that they had to deal with the dreaded San Jose scale. On the College treei 

 the lime-sulphur wash has been found thoroughly effective. When pro- 

 perly made and carefully applied in early spring, before the buds begin to 

 swell, it completely removed the scales and left the trees clean; at the same 

 time it destroyed other insects which attack the buds. In previous reports 

 full descriptions have been given of the methods of making the wash and 

 the proportions of the ingredients, it is unnecessary therefore to repeat them 

 here. 



The Rose-chafer (fig. 14), or Rose-beetle {Macrodactylus suhspinosus) 

 has been remarkably abundant this year. Specimens have been sent or 

 brought to me from Toronto on the east, to the County of Essex on the west, 

 but none from localities east of Toronto. In the Niagara District and here 



Fig. 14.— Rose Chafer (,]facrodarlylns >tubt'j)inosus) . a, beetle ; b, larva ; c and d. mouth-parts of same; e, pupa; 

 injury to leaves and blot-soms with beetles, natural size, at work. (After Marlati, U.S. Dept. Agriculture.) 



and there in the counties bordering on Lake Erie, the insect was especially 

 abundant. In the neighborhood of London it has been prevalent for some 

 years, but does not seem to extend much to the northward of the region re- 

 ferred to. There are, however, isolated occurrences in other parts of the 

 Province recorded, as an example of which may be mentioned a severe attack 

 upon young corn in the County of Grey last year. 



The following is an account of the insect furnished by the writer to the 

 Toronto Globe in July last, which may be repeated here: — 



This destructive insect is called the Rose-beetle, from its attacks upon 

 the buds and full-blown flowers of roses, which it burrows into and devours, 

 but it by no means confines its attention to this plant. It is especially in- 



