1905 



ENTOMOLOGICAL SOCIETY. 



115 



spraying should be done before the insects develop their wings. When these 

 insects are present on a vine the leaves soon become white in patches and 

 then fall to the ground. 



Fig. 51. The Oyster-shell Scale. 



Fig. 52. Grape-vine flea- 

 beetle and larva, much en- 

 larged ; also leg, greatly 

 magnified. 



Fig. 53. Grape-vine Flea-beetle, showing beetles and larva; at work. 



The Grape Vine Flea-Beetle, Haltica chalybea, 111. (Figs. 52 and 53). 

 This is another well known grape insect, but one which often does much 

 injury in Ontario to the foliage of Virginian creepers. When the dirty, 

 yellowish-brown grubs, which have black shining bristle-bearing tubercles 

 are found on the vines, they may be destroyed by a Paris green spray 1 oz. 

 in 10 gallons of water. All fallen leaves and rubbish should be burned in 

 autumn to prevent the mature beetles from hibernating near the vines. 



The Violet Saw-fly, Emphytus canadensis, Kirby. Pansies and violets, 

 which are always favourites in gardens, are sometimes seriously attacked by 

 the false caterpillars of this sawfly. These larvse which are smooth and 

 bluish-black in colour are about ^ an inch in length when mature. When 

 in their younger stages they have the habit of eating little holes in the leaves, 

 but as they reach maturity they feed mostly along the edge of a leaf. These 

 false caterpillars when at all numerous do a great deal of harm, oftentimes 

 completely defoliating plants. At Ottawa the species is of common occur- 

 rence, some seasons doing considerable damage. Last June and the first half 

 of 'Tuly the larvae were very abundant on violets on the grounds of the Cen- 

 tral Experimental Farm. In Canada, Dr. Fletcher tells me injuries by the 

 Violet vSawfly, have not been reported from very many localities. In 1898 

 considerable injury was done in large beds of violets grown under glass in 

 Toronto. As the larvae feed as a rule during the night. Dr. Fletcher recom- 



