HEMIPTERA. 



475 



size). I have also figured from Curtis the A. floris rap(B (fig. 1047 : 

 No. I the winged insect, No. 3 the larva, No. 4 natural size). The 



Fig. 1046. — Aphis dianthi, 

 magnified. 



Fig. 1047.— a. rapae and A. floris rapae (Curtis). 



vastator attacks a large number of plants, and is one of the 

 most destructive pests which can annoy the 

 gardener. It lives upon the under side of 

 the leaves, and I have counted a hundred insects 

 on a leaflet of the potato plant (fig. 1048). 



The Black Aphis {A. rumicis, 

 fig. 1049) is considered to be A. 

 fabcB, or Bean Aphis. It lives 

 upon the stalks of the broad 

 beans, near the top, and it is usual 

 to cut off their top so as to de- 



FlG. 1048. — ^Aphides on 

 Potato-leaf, nat. size. 



stroy these creatures. ApVs:iSa7nS 



Our plum-trees are terribly infested by the Plum Aphis {Hya- 

 lopteris pruni, fig. 1050). The under side of the leaves are sometimes 

 so thickly covered with these creatures that the point of a pin cannot 

 be inserted between them. They are of a peculiar light grass-green, 

 and there are very few years in which they do not infest my trees. 



Our peas are occasionally, but not often, attacked by the Pea. 

 Aphis {Siphonophora pisi, fig. 1051). In some years, in other localities. 



