ENTOMOLOGY 277 



sects reappear upon the plants, from April to October, according to 

 locality. 



The Coiled Rose Slug. The third of the rose slugs under con- 

 sideration, the coiled rose slug, is a comparatively recent importation. 

 From the two preceding species this insect may be readily separated 

 on account of its larger size in the adult stage. It has nearly trans- 

 parent wings, and a wide band which crosses its shining black ab- 

 domen near the middle. The body is comparatively slender, and 

 the head longer than in the other two species. The wing expanse is 

 about five-eighths of an inch and the length of the body about three- 

 eighths of an inch. 



The larva when mature is about three-fourths of an inch long 

 and differs notably from the other two species here considered in 

 being perfectly smooth. It is cylindrical and tapers very slightly 

 toward the posterior extremity. The color is metallic green above, 

 ornamented with small white dots, and the lower surface, including 

 the legs, is grayish white. The head is yellowish orange, with a dark 

 brownish-black stripe down the middle. The eyes are black. The 

 first thoracic segment is blue and the last two are gray. The larva 

 habitually rests in the coiled or curled position, one that is never as- 

 sumed by either of the other rose slugs, and it is from this habit that 

 it derives its English name. 



The coiled rose slug is credited with being double-brooded, and 

 as it extends its range southward it will probably produce a third 

 generation, since w r e know of the appearance of the worm from May 

 to October. Eggs are deposited singly on the underside of the leaves 

 to the observed number of from three to seven. This slug differs 

 from the others in devouring the entire substance of a leaf, feeding 

 along the edges with its body coiled beneath it, and when at rest re- 

 maining curled in a ball on the lower surface. Upon reaching ma- 

 turity the slug deserts the leaves and bores into the pith of the stems 

 of dead rose bushes or other available plants, and here the pupal state 

 is passed, the fall generation hibernating to emerge the following 

 May. At Boston, Mass., the adults have also been observed in July, 

 this indicating the first new generation. The remedies are the same 

 as for the American rose slug, subject, however, to the same changes 

 as for the bristly rose slug. (Cir. 105 U. S. D. A., B. E.) 



Rose Leaf Hopper. A whitish spotted condition of rose leaves, 

 giving them a gray appearance, indicating the presence of numerous 

 white insects feeding upon their lower surface, is very common. 

 These insects represent one of many kinds of closely allied insects 

 that infest the lower surface of the leaves of numerous plants. By 

 means of their tiny beaks they suck the nourishment from the leaves, 

 destroying the tissue contents at the points of injury, resulting in the 

 spotted aspect of the upper surface. When disturbed, these insects 

 hop to an adjacent leaf so that one needs to use a little caution in 

 order to observe them at their work. The injury from these inscct.s 

 can be prevented by spraying the plants from beneath, with kerosene 

 emulsion, or dusting them frequently with buliach or white helle- 

 bore. (Bui. 36 Nev. Agr. Exp. Sta.) 



