CHAPTER IV 



HYMENOPTERA ACULEATA COXTIXUED- 



OR ANTS 



-DIVISION IV. FORMICIDAE 



B 



Division IV. Heterogyna or Formicidae Ants. 



The segment, or the two segments, behind the propodeum, either 

 small or of irregular form, so that if not throughout of 

 small diameter, the articulation until the segment behind is 

 slender, and there is great mobility. 

 The trochanters undivided. The 

 individuals of each species are 

 usually of three kinds, males, females 

 and workers ; the latter h are no 

 wings, but the males and females 

 (ire usually winged, though the 

 females soon lose the flying organs. 

 They live in communities of various 

 numbers, the majority being workers. 

 The larvae are helpless maggots fed 

 <f nd tended by the ivorkers or by 



" FIG. 53 Abdomens of ants. 



A, Of Camponotus ruli-i/^.-i 



IN ants the distinction between the (Formicides) ; B, of Ecta- 



,-, . ^,111- tnmma auralum (Ponerides); 



three great regions of the body is very c> of Aphmnog^i., bar- 

 marked. The abdomen is connected bara (Myrmicides). , Pro- 



. . podeum ; b, first abdominal 



with the propodeum in a peculiar manner, segment forming a scale or 

 one or two segments being detached node : c, second ; rf, third 



abdominal segment. 



from the main mass to form a very 



mobile articulation. This is the most distinctive of the char- 

 acters of ants. The structure and form of these parts varies 



