GLOSSARY 



OF THE PRINCIPAL SCIENTIFIC TERMS USED 

 IN THIS VOLUME. 



Abdomen. The third or tail region of the body. The segments, or 

 rings, of which it is made up, can be more easily distinguished 

 than those of the other regions. In adult insects (with one 

 exception) it is destitute of locomotive organs. Many larvae, 

 however, have fleshy sucker-feet, or prolegs, attached to their 

 abdomen. These are shed with the skin when the larva changes 

 to pupa. 



Abortion. An organ is said to be aborted when it has been arrested in 

 development at a very early stage. 



Alveoli. Applied to the cells of bees. 



Amadou. A substance prepared from a fungus (Folyporus fomen- 

 taritis], found upon old trees, especially the oak, ash, fir, cherry. 

 Used as a styptic for haemorrhage. Boiled in a solution of nitre 

 it is employed as tinder. 



Amorphous. Shapeless. 



Antenna A pair of jointed appendages, feelers, or horns, placed upon 

 the head of insects, in front of the eyes or between them, and not 

 belonging to the mouth. Of various forms and length. 



Anterior. Placed before, in front. 



Apodous. Footless. 



Arachnida. The Spiders and their allied forms. They constitute a 

 well defined group within the great division ' Articulata ' of the 

 animal kingdom. Arachnids are divided into seven orders, of 

 which the Araneklea are the true Spiders. 



Articulated. Jointed. The Articulata is one of the great divisions of 

 the Animal Kingdom characterised generally by the body being 

 divided into a number of rings, or segments, some of which are 

 possessed of jointed limbs. Insects are included in this division. 



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