294 DESTRUCTIVE INSECTS. 



following 1 ingredients, viz. ; " 2 Ibs. soft soap, 2 Ibs. 

 flour of sulphur, 1 Ib. leaf tobacco, 2 oz. nux vomica, 

 and 1 quart train-oil all boiled together in 8 gallons 

 of water. Pine plants require to be anointed all over 

 with the liquor, and when re-potted in fresh soil and in 

 awell cleansed house, are freed from thepest." NicoL 



The same wash may be effectual for destroying the 

 American blight, provided all the scabrous bark of the 

 tree be first cut away, and particularly the little nodes 

 raised by the insects, so that the liquor may penetrate 

 into every crevice where the insects are secreted. A 

 wash of the consistence of paint, of clay and water, 

 soft soap and quick lime, mixed together applied with 

 a brush is also beneficial to rid trees of this or any 

 other insects. 



Aphides. This is one of the most numerous tribes 

 of insects which infest plants. There are several 

 species of them, as the ulmi, sambuci, tilia, &c. ; but 

 it is probable, that the same species assume diiferent 

 colours according to the qualities of the juices on 

 which they live. The green aphis on the rose tree, 

 the black one on the field bean, and the red one on 

 the common tansy, are, perhaps, the same insect. 

 They have many provincial names ; as shrimps, 

 blacks, lice, colliers, &c., the most common being the 

 " green fly." 



Being produced by animalcular generation, their 

 fecundity is astonishing. On trees they blister and 

 deform the foliage, disfiguring it by the emission of 

 what is called honey-dew, so attractive to bees and 



