70 



Fig. 34. 

 Selandria rosce produces 



Another very injurious and abundant species is 

 Selandria rubi, the larva? of which destroy the foliage 

 of both wild and cultivated raspberries. They are not 

 slimy like those of the foregoing species, but bear 

 whorls of white spines in rows upon the back and 

 sides. (See figure 34.) The leaves are pierced with 

 , small holes by the young worms, and as these increase 

 '.- .' in size the holes become larger and more conspicuous, 

 & The period of growth and manner of transformation 

 y are as in the preceding species, but there appears to be 

 only one brood, the flies not appearing until the fol- 

 lowing spring. The larva? appeared to be unusually 

 abundant last season. The flies, an example of which 

 is shown in figure 35, magnified, have a black head and 

 thorax, and reddish or yellowish abdomen and legs. 

 a slug which feeds vora- .. 



ciously at night upon the upper surface of the leaves 

 of roses. It lives about a fortnight and is of a dull 

 yellowish colour, and not slimy. A cell is constructed 

 in the ground and the slug does not pupate until the 

 following spring, there being only one brood. The 

 small blackish flies emerge from the ground when the 

 roses are in leaf, and deposit their eggs in slits sawed 

 in the margin of the leaves. 



The crape-grower is sometimes much annoyed by 

 the larvae of Selandria vitis, which is a blackish fly JJ1 &- °°- 



having the thorax red above, and the legs below the knees whitish. The worms, when full- 

 grown, are half an inch long, and are yellowish with transverse rows of black spots, 

 Feeding side by side in rows of from Ave to twenty, they speedily devour a leaf and aeekc 



Tig. 36. 



a new one. Cells are formed in the earth by the mature larvae, and the flies from the 

 first brood issue about the first of August ; those of the second not until the following, 

 spring. 



