CHAPTEE IV 



HYMENOPTEEA ACULEATA CONTiyUED- 



OK ANTS 



-DIVISION IT. FORMICIDAE 



Division IV. Heterogyna or Formicidae— Ants. 



The segment, or the tioo segments, hehincl the propocleum, either 

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

 small diameter, the articulation with the segment hehincl is 

 slender, and there is great moMlity. 

 The trochanters undivided. The 

 individuals of each species are 

 usually of three hinds, mcdes, females 

 and workers; the latter have no 

 icings, hut the males and females 

 are usually winged, though the 

 femcdes soon lose the flying organs. 

 They live in communities of various 

 ninnbers, the majority ieing workers. 

 The larvae are helpless maggots fed 

 and tended iy the workers or liy 

 the female. 



In ants the distinction between the 

 three great regions of the body is very 

 marked. The abdomen is connected 

 with the propodeuin in a peculiar manner, 

 one or two segments being detached 

 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 



Fig. 53 — Abdomens of ants. 

 A, Of Cmnponotus rithripas 

 (Formicides) ; B, of Ecta- 

 tomtna auratum (Ponerides); 

 C, of Aphaenogaster bar- 

 bara (Myrmicides). a, Pro- 

 podeum ; b, first abdominal 

 segment forming a scale or 

 node ; c, second ; d, tiiird 

 abdominal segment. 



