INJURIOUS INSECTS OF 1904. 179 



ing they can be readily shaken into sheets placed below to receive 

 them. They sometimes appear in large numbers when roses begin 

 to bloom. Frequently grapes, apples, plums, etc., also suffer. 



Slugs, Slug Caterpillars: These worms, found in leaves of 

 various bushes and shrubs, are larvae of four-winged flies. They 

 are not true caterpillars. Two forms are found on the willow ; one 

 black with orange spots on the side ; another, larger and green. 

 Some feed on leaves of cherry, plum and pear ; others on roses. 

 Some have a slimy covering, while others look more like a genuine 

 caterpillar. They are all leaf eaters, and can be easily killed, there- 

 fore, by Paris green sprays, or white hellebore, i oz. in 1 gal. of 

 water, or dry, or tobacco solution. The slimy form can be de- 

 stroyed by dusting with air slaked lime, fine ashes or even road 

 dust, and they will all yield to pyrethrum. 



Mildew on Roses: This fungus which attacks the leaves of 

 roses, as well as many other similar parasitic plant growths, has 

 been controlled by the Entomogolist by the application of "potas- 

 sium sulphide" (liver of sulphur) using i oz. dissolved in a gal. of 

 warm water, and sprayed on bushes at the very first appearance of 

 attack, repeating the treatment occasionally. If one delays appli- 

 cation until the fungus has worked into the tissues below the sur- 

 face, the above fungicide cannot reach it. Hence, the necessity of 

 early and frequent applications. If roses calling for treatment are 

 trained against porch or house, avoid getting the liquid on the 

 paint; white paint particularly is badly discolored by it. 



Small Ant Hills in Lawns and Walks : The writer has stopped 

 the depositing of sand by ants on a lawn by the same agent used 

 against the large unsightly mounds made by one species in our 

 pastures and elsewhere, though it is somewhat more laborious and 

 expensive. The process consists in pouring into the opening of 

 each ant hill about ^2 teaspoonful of bisulpide of carbon, and then 

 closing the opening with earth. It would hardly pay one to treat occa- 

 sional, very small and scattering hills in this way, but occasionally 

 one will be annoyed by a cluster of hills, the owners so busily en- 

 gaged in bringing up sub-soil that an unsightly patch on lawn or 

 walk results. When several so located have been treated, throw a 

 wet burlap sack or something of the kind over them for several 

 hours to still further aid in retaining the gas. When a cluster of 



