DISEASES AND INSECTS ATIACKING THE ROSE. 151 



to open. A little observation will enable the cultivator 

 to seize the right time for the scalding operation. 



Rose Leaf-Hopper. — lettlgonia Rosfn of Harris, who 

 states that it has been mistaken for the Yine-fretter, 

 or Thrips. It is yellowish white, and about three-twenti- 

 eths of an inch long ; the male has two recurved append- 

 ages at the tip of its hind body. Dr. Harris says, " Swarms 

 of these insects may be found in various stages of growth 

 on the leaves of the rose-bush through the greater part of 

 summer, and even in winter upon housed plants. Their 

 numerous cast skins may be seen adhering to the lower 

 side of the leaves. They pair and lay their eggs about 

 the middle of June, and they probably live through the 

 winter in the perfect state, concealed under fallen leaves 

 and rubbish on the surface of the ground. Fumigation 

 with tobacco, and the application of a solution of whale- 

 oil soap in water with a syringe, is the best means for 

 destroying these leaf-hoppers." 



We have enumerated but a very small part of the nu- 

 merous insects which infest the rose, and in the absence 

 of correct information on this important branch of flori- 

 culture, it is much to be hoped that farther investigations 

 will be made by men of leisure. As an instance of the great 

 variety of these insects, a French writer remarks that he 

 "found in less than an hour, on the leaves of two species only 

 of the Rose, six kinds of small caterpillars, all differing from 

 each other in the number of their feet, the color of their 

 head and body, and the lines and points with which they 

 were marked. Their habits were all apparently the same. 

 They lived between two or three folds which they had se- 

 cured in shape by the films of their silk. Thus enveloped 

 and protected, they eat the leaf until it is wholly or at 

 least partly consumed. They then endeavor to establish 

 themselves on another leaf, in which also they enwrap 

 themselves, and consume it in the same manner. The 



