142 LEAF-BEETLES. 



beds, where they can become very destructive, and if at aU nu- 

 merous they devour the leaves of these plants with such avidity 

 that they are soon riddled with holes, which of course materially 

 injures the crop of berries. This is especially true of the Central 

 States. In such cases the old beds should be plowed up and de- 

 stroyed as soon as the crop has been picked, and new beds should 

 be set out in fresh places, and for this purpose new plants are to 

 be selected that were free from the attack of such root-worms. 

 Wherever a two-year picking rotation is used, in which the old 

 plants are immediately destroyed, this root-borer can not increase 

 very greatly. Arsenical poisons are also very satisfactorily used 

 to kill the adult when they are noticed upon the foliage, but it 

 would be unsafe to do so when the fruit is already well set and 

 large. Hellebore is also of use, and air-slaked lime dusted over 

 the plants will, to some extent, lessen the trouble. 



Fig. 146 — Colas is /?av;c?a , Say .—After Forbes Fig. 148. — Glyptosceljs crypti- 



(in part). cus, Say. — After Saunders. 



Prof. Forbes, who has studied, very closely the three species 

 of strawberry root-borers, i. e., Paria atcrrima Oliv., Colaspis 

 brimnea Fab., and Graphops puhescois Mels., has also described 

 the early stages of these beetles. He gives a full account of them 

 in the "Thirteenth Report of the State Entomologist of Illinois." 

 Like all his reports this one is of great value to the growers of all 

 kinds of fruits. 



By looking at the illustrations, (Fig. 145. 146, 147), which 

 are reduced in size from the originals made by Prof. Forbes, we 

 can perceive the structure of these beetles, and that of their ea»' 

 Her stages. 



