334 



ON THE CULTURE 



BOOK III. 



ON THE DIFFERENT SPECIES OF INSECTS THAT ARE 

 FOUND IN HOT-HOUSES, WITH EFFECTUAL METHODS 

 OF DESTROYING THEM. 



Besides the different species of insects which are 

 so pernicious to the Pine-apple plant, and which 

 are described in the foregoing part of this work, 

 there are other kinds of insects in most stoves, 

 which frequently prove very troublesome ; and 

 though they are not injurious to the Pine-apple, 

 are yet very prejudicial to most other plants kept 

 there, either for use or ornament. It may there- 

 fore not be improper to bring them also under 

 consideration. 



1. The Aphis. a This, I believe, is the most 

 numerous of all the kinds of insects in this island : 



» The Aphis is of the Order Hemiptera. 

 Its Characters are : 

 The rostrum of the Aphis is bent inwards. 

 Their antennae are setaceous, and longer than the thorax. 

 They have either four erect wings, or are without wings. 

 Some authors assert that the male Aphides have wings, and 

 that all the females are without. 

 Their feet are made for walking. 



They have generally two little horns or hairs placed on the 

 hinder part of their abdomen. 



The Aphis has six feet, and the tarsi in each sex have only 

 one articulation. 



