CHAPTER IV 



HYMEXOPTERA ACULEATA CONTINUED- 



OR ANTS 



-DIVISION IV. FORMICIDAE 



d 



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 <</' 

 swill diameter, the articulation with the segment behind is 

 slender, and there is great mobility. 

 The trochanters undivided. The 

 i nili rid in/Is of each species are 

 usually of three kinds, males, females 

 and workers; the latter have no 

 v/-///'/.s, but the nudes and females 

 are usually winged, though the 

 females soon lose the flying organs. 

 They lire in communities of various 

 n n mbers, the majority being workers. 

 The larvae are helpless maggots fed 

 and tended by the workers or by 

 the female. FlG _ 53 _ Abdomens of ants . 



A, Of Camponotus //('///^s 

 (Formicides) ; B, of J-J-t"- 

 tommn a, i rut a in (Ponerides); 

 C, of Aphdii"!i'i.^'i bar- 

 !HI,-II (Myrmicides). , Pro- 

 podeum ; b, first abdominal 

 segment forming a scale or 

 node : c, second ; d, third 

 abdominal segment. 



Ix ants the distinction between the 

 three great regions of the body is very 

 marked. The abdomen is connected 

 with the propodeum 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 



