1915 ENTOMOLOGICAL SOCIETY. 15 



When spraying cabbages, on account of the smoothness of the leaves a " sticker " 

 should be added to the mixture. Such can be made by boiling together for about 

 an hour two pounds of resin and one pound of sal soda (crystals) in a gallon of 

 water. This is sufficient for 40 gallons and if used with Paris green, one pound 

 of fresh lime should be added. 



Attackikg Fkuit axd Fores'j^ Tuees. 



The two species of Tent Caterpillars, the American Tent {Malacosoma 

 americana) and the Forest Tent {MaJacoaoma dissiria) were again noticeably 

 present in many places, but the injury was much less than that effected in either 

 of the three previous years. 



The Pear Slug {Eriocampoides limacina) was abundant in orchards on plum 

 and cherry trees. It is an easy insect to control. If only a few trees are attacked 

 freshly slaked lime dusted on the leaves is a sufficient remedy. If the occurrence 

 is widespread, spraying with either Paris green or arsenate of lead should be 

 adopted. 



Other common pests such as the Codling Moth, the Eye-spotted Bud-moth 

 and the Cigar-case Bearer were troublesome in unsprayed orchards. 



Attacking Greenhouse and Garden Plants. 



The Eose Leaf-hopper (Typhlocyha rosce). The foliage of roses through- 

 out the district was heavily infested with this insect. The whitish patches 

 resulting from the attack of the insects were very conspicuous in the middle of 

 June. In some gardens the attack was stopped by a weak application of " Black 

 Leaf 40.'^ 



The Violet Sawfly {Empliijius canadensis). Pansies were injured to some 

 extent by the bluish-black faise caterpillars of this sawfly. At Ottawa they were 

 found in the middle of June, and at this time the larvae were approaching maturity. 

 They feed, as a rule, during the night. We have found that dusting the plants 

 in the evening with white hellebore, or with Paris green mixed with 50 times its 

 weight of common flour, will destroy the larvae. 



The Tarnished Piant Bug (Lygns pratensis) was destructive to dahlias 

 and other flowering plants. It is an extremely difficult insect to control. I know 

 of no satisfactory remedy. The bugs are most active during the heat of the day, 

 but in the early morning they are comparatively sluggish, at which time they may 

 be beaten off the plants into an inverted umbrella and then put into some re- 

 ceptacle containing coal oil and water. 



Aphids of many kinds were more or less destructive to greenhouse and garden 

 plants. The Greenhouse Leaf-tyer (Phlycta;nia rubigaUs) was present notice- 

 ably in one greenhouse, and Ped Spider was responsible for much damage to many 

 kinds of plants. 



At the conclusion of his report, Mr. Gibson exhibited a specimen of the 

 European Praying Mantis (Maniis reUgiosa L.), and said that the specimen was 

 found in a potato field at Carrying Place, Prince Edward County, Ontario. It 

 was, he thought the first specimen ever sent in to the Department at Ottawa. 

 The habits of the insect were briefly discribed and reference given to the first 

 American records in New York State. 



Dr. Bethune: I had a specimen taken near Simcoe, Norfolk Co., about two 

 years ago. I thought that was unique for Ontario. 



