k. 



ON APHIDES. 



On the rose-buvls are numerous Aphides, A. Rosa, of the natural size; in 

 the foreground are individuals of the same, winged and wingless, magnified. 

 In the midst of some small Aphides on a leaf is the leech-like grub of a Scceva 

 Pyrastri) thinning their numbers, and to the right is a winged Fly, the mature 

 condition of the same. Another species of the genus, Scceva balteata, is seen 

 above in different positions on the wing. To the left on a branch of elder, are 

 individuals of the Elder Aphis, A. Sambucaria, beneath which is a magnified 

 representation of the same attended by a Brown Ant, Formica brunneu, pro- 

 curing a supply of honey-dew. 



UT what sort of insects are Aphides ? demands 

 perhaps a reader who is no entomologist. In 

 plain English, they are Plant-lice. But what 

 are Plant-lice ? is the question put by another 

 who is no observer of nature. Let us inquire 

 :n reply, what is a Wasp, a Spider, a Butterfly ? Did you ever 



