INSECTS AFFECTING FLOWERS IN THE WIN- 

 DOW-GARDEN AND GREEN-HOUSE. 



INJURING THE LEAVES. 



Plant-lice or Aphides. 



There are many different species of aphides, plant- 

 lice, or " green flies," affecting the various flowering 

 plants. But all are quite similar in life-history and 

 habits, and the same remedies apply to each. They 

 all multiply with marvellous rapidity on account of 



their habit of giv- 

 ing birth to living 

 young without the 

 presence of male 

 1 — 3pH^ aphides. They 

 mature rapidly, 

 and obtain food 

 by inserting their 

 pointed beaks into 

 the stem or leaf, 

 and sucking out the sap. There are generally two 

 forms of them, one being winged (Fig. S3, b, c) and 

 the other wingless (a). These insects are the com- 

 monest pests of flowering plants. 



Remedies. — Tobacco is the great specific for these 

 insects. It may be used in various forms, but gener- 

 ally the most satisfactory form is that of the refuse 



... «r- • CC 

 Fig. 83. Aphis : a, wingless form, magnified 

 b, winged form, magnified ; c, same, 

 natural size. 



