10 



ENTOMOLOGICAL SOCIETY OF ONTARIO. 



these mention may be made of the Colorado Potato beetle which has been kept in check 

 with h^ss trouble than usual. Of course the only practical remedy is Paris Green, which 

 meets all requirements cheaply and effectively. Several instances have been brought 

 under my notice of the ravages of the Gray Blister-beetle {Macrohasls unicolor, Kirby) 

 upon Potatoes and Horse-beans. This beetle is most frequently found in the perfect state 

 upon the Fall Meadow Rue (Thalictrum Cornuti) but also occurs on other plants. In 

 the larval condition it lives as a parasite upon the eggs of Locusts. A closely allied 

 species with similar habits was sent in from two or three localities as a pest upon 

 mangels, vegetables and garden Asters, of which last it destroyed the flowers. 



Red Spiders have been abundant and injurious to many plants in those parts of 

 Ontario where dry weather has prevailed, currant bushes and beans were particularly 

 attacked. Spraying with a weak Kerosene Emulsion has been found to be one of the 

 best remedies. On the Experimental Farm a small species of Scymnus, one of the Lady- 

 bird beetle.s, was found to be very u.seful in thinning their numbers. 



A stalk borer {Hydrcecia cataphracta, Grt.) was locally troublesome in tomato fields 

 and also occurred in several herbaceous plants, as holyhocks, sunflowers and lilies. 



The root maggots of the cabbage and onion still remain troublesome pests of the 

 market gardener. When attacking cabbages, the best results have been obtained by 

 pouring hellebore-tea around the roots, and with onions and radishes some experiments 

 with common salt were apparently attended with the greatest measure of success this 

 season. These experiments will be repeated again next year. 



Two of the true bugs Li/gus pratensis, L., the Tarnished Plant-bug, (Fig. 3) and Fa^cilo- 

 capsus lineatus. Fab. both common species, have been very abundant and injurious in some 

 localities this year. Perhaps the most practical remedy for these is beating the infested 

 plants over a beating net or pan containing some water, with a little coal oil on the 

 surface. This is best done early in the morning when the insects are not so active as- 

 later in the day. 



Several kinds of plant lice have been abundant in gardens. Species upon turnips, 

 carrots, cabbages and celery having been sent in. The best remedy for these insects, 

 where it is practicable, is to spray the plants with a kerosene emulsion, as early as 

 possible in the season, before they have multiplied. 



i^^ig- 3. 



Fig. 5. 



Of insects injurious to forest trees mention may be made of two small caterpillars 

 which have been attacking the maples in some parts of Ontario and Quebec. The first 

 of these InrurvaHa acerijolidla, Hew. is a case-maker, which cuts out round disks of 

 the maple leaf and forms a flat case, inside which it lives. In the autumn it falls to the 

 ground and passes the winter inside its case as a pupa. The tiny steel-blue moths, with 

 orange collars, emerge the following spring. The other is the species which has been 

 mentioned by Mr. Fyles, possibly Catastega aceriella, Clem. The larva forms a tent 

 between the two surfaces of the leaf and lives inside a tube made out of its own frass. 

 This tube starts close to the petiole and gradually enlarges as the larva grows, until it 



