1924 ENTOMOLOGICAL SOCIETY 61 



foliage in many black currant and in several raspberry plantations was largely 

 destroyed. In one raspberry patch at Beamsville, all the leaves on the bearing 

 canes were brown and dead before the berries were picked, and consequently 

 the crop was almost a complete failure. In a few instances strawberries were 

 also badly infested with the mite. 



Blackberry Leaf Miner (Metallus beihunei). A few blackberry planta- 

 tions near Vineland were fairly heavily infested with this species but, generally 

 speaking, the miner was less abundant in the Niagara and Burlington districts 

 than it has been for several years. 



Striped Tree Cricket (CEcanthus nigricornis). Although complaints of 

 tree-cricket injury to raspberry were received from all parts of the province, it 

 is doubtful if this insect was more troublesome than usual. So-called winter- 

 killing of the canes was remarkably prevalent, and many persons no doubt 

 erroneously attributed this injury to the tree cricket. 



The Raspberry Saw- Fly (Monophadnoides rubi). This pest was again 

 somewhat injurious in several localities. At Vineland the emergence period of 

 698 adults extended from May 28th to June 22nd, the last flies appearing approx- 

 imately four weeks before Cuthbert berries ripened. 



The Strawberry Root Weevil (Otiorhynchus ovatus). On three fruit 

 farms near Dixie portions of strawberry fields were heavily infested with this 

 insect. On account of the prevalence of winter-killing, it was impossible to 

 gauge the extent of the damage caused by the root weevil. This is the first time 

 we have seen 0. ovatus present in injurious numbers, and it is worthy of note 

 that the farms on which it occurred are models for cleanliness — well cultivated 

 and remarkably free from weeds. On July 4th approximately 75 per cent, of 

 the insects had reached the adult stage but were still in the ground and were 

 still pale brown in colour. Almost all the others were in the pupal stage, hence 

 it would appear that the new generation is a cleancut and not a straggling one. 



The Strawberry Leaf Beetle (Paria canella). For several years the 

 adults of this species have done considerable damage to the foliage of strawberries 

 in southwestern Ontario. This season in most places the injury was not so 

 great as it was last year, but there were a few striking exceptions, notably at 

 Georgetown, Campbellville and Simcoe. At the last place raspberries as well 

 as strawberries were very severely injured on some farms, one plot of raspberries 

 having practically every leaf destroyed. In this case the plantation was weedy 

 and neglected. 



The Strawberry Weevil (Anthonomus signatus). This pest was trouble- 

 some in a few Niagara strawberry fields. 



Truck Crop Insects 



The Onion Thrips {Thrips tabaci). Dry weather conditions were favour- 

 able for the multiplication of this insect, and it caused much loss in the onion 

 marsh at Point Pelee and in other parts of the province. 



Striped Cucumber Beetle (Diabrotica vittata). Cucumber beetles were 

 very abundant in the Brighton district this fall, and caused some loss by eating 

 out holes in pumpkins. In some instances 40 per cent, to 50 per cent, of the 

 pumpkins were badly injured. One field which should have produced fifty tons 

 of pumpkins, yielded only ten tons fit for canning. In most sections, however, 

 the beetle was quite scarce. 



