1905 ENTOMOLOGICAL SOCIETY. Ill 



ig often very destructive to the flowers of rose bushes, as well as to the bloom 

 of many other kinds of flowering plants. In Ontario this insect has been 

 particularly abundant in the Niagara district. The mature beetles last for 

 about five weeks and when present in large numbers are very difficult to get 

 rid of. It has been found, however, by Prof. F. M. Webster that 95 per 

 cent, of the adult beetles may be killed by spraying them with half a pound 

 of fish-oil soap in a gallon of water. The suds must be thrown directly onto 

 the beetles while they are clustered on the flowers. This remedy of course 

 is only useful in killing the beetles on the plants ; it has no effect in keeping 

 them off afterwards. These beetles, although very active during _ the hot 

 hours of the day, are sluggish early in the morning, and at this time naay 

 be easily beaten from the plants into an inverted umbrella and then emptied 

 into some vessel containing water with coal oil on the surface. Rose bushes 

 may be protected by covering them with netting. 



The American Rose-Slug, Endelomyia (Selandria) rosce, Harr. Oc- 

 curring commonly in Ontario, and doing considerable damage every year to 

 the foliage of roses, is a slug-like larva about one-third of an inch long, 

 green in colour, swollen near the head, but not slimy as is the case with many 

 other allied saw-fly larvae. This false caterpillar is nocturnal in habit, and 

 feeds on the upper side of a leaf, but during the day, when at rest, may be 

 found concealed on the under-surface of the leaf. Infested plants will soon 

 show the presence of these slug-like larvae from The foliage becoming con- 

 spicuously skeletonized. These rose slugs may be easily destroyed by dust- 

 ing the plants with white hellebore, or spraying them with a mixture of two 

 ounces of hellebore to every two gallons of water. A weak solution of Paris 

 green, one ounce in fifteen gallons of water, is also very effective. 



The Bristly Rose-Worm, CJadius pectinicomis, Fourcr. Another 

 saw-fly larva which is abundant in Ontario, and which, at Ottawa, is the 

 commonest of the three rose saw-flies mentioned in this article, is the Bristly 

 Rose-worm. This larva, when full grown, is about two-thirds of an inch 

 long, and ranges in colour from dirty yellowish-green to a glaucous-green, 

 with a darker green line down the back. This false caterpillar is covered 

 with stiff hairs, which give it a conspicuous bristly appearance. The larva, 

 when young, works very much in the same way as the Rose-slug, skeleton- 

 izing the leaves, and leaving whitish blotches. As it grows older, however, 

 it eats out irregular holes all over the leai, often consuming the whole sub- 

 stance, except the stronger ribs. The same remedies used for the Rose-slug 

 are applicable for this insect. 



The Curled Rose- Worm, Emphytus cinctipes, Nort. This rose-worm 

 is also common all through Ontario wherever roses are grown, and, like the 

 two preceding species, is an important enemy of that plant. TFe larva is 

 easily distinguished from either of the other two kinds mentioned above, 

 being smooth, and in having a yellowish brown head marked with a broad 

 brownish-black spot. The body is dark green above, with the sides and legs 

 grayish-white. This larva eats the entire substance of the leaf, feeding 

 along the edges, with the body curled beneath it. When at rest it remain>3 

 curled up on the under-surface of the leaf. Hellebore, or a weak solution 

 of Paris green, is also recommended for the Curled Rose-worm. 



The Small White Cabbage Butterfly, Pontia rapae, L. (Fig. 48). 

 This pest of the market gardener, which now occurs right through Canada, 

 not infrequently requires attention in flower gardens, from its ravages to 

 stocks and other crucifers, mignonettes, nasturtiums and spider flower 

 (Cleome). These velvety green caterpillars about an inch in length, with a 



