HABITS OF ANERGATES. 87 



upon their slaves, and cannot even feed themselvea 

 The whole problem is, therefore, most puzzling and 

 interesting.' 



As regards Strongylognathus^ Von Hagens made two 

 suggestions, the first being that this insect is really a 

 monstrous form of Tetramorium. This, however, 

 cannot at any rate be the case with Aner gates. On 

 the whole, then, he inclined to think that perhaps the 

 nests containing Strongylognathus or Anergates are 

 only parts of a community, and that the young of the 

 Tetramoriuma are in another nest of the same com- 

 munity. This would account for the absence of the 

 young of the TetraTnoTiutnSy but would not remove 

 all the difiSculties. It is in other respects not 

 consistent with what we know of the habits of ants, 

 and on the whole I agree with Forel in thinking the 

 suggestion untenable. 



The diflSculty of accounting for the numbers of 

 Tetramoriwrna^ coupled with the absence of young, 

 was indeed alm6st insuperable as long as the workers 

 were supposed to live only for one year. My observa- 

 tions, however, which show that even in captivity 

 workers may live for as long as six years, place the ques- 

 tion in a different position, and give us, I think, a clue. 



On the whole, I would venture to suggest that the 



male and female Anergates make their way into a nest 



' On the contrary, in Tomognath'us xuhleevis, a Finland Bpeciea 

 which lives in the nests of Leptothorax muioorum and L. aeet-vorv/m. 

 the workers only are known. The male, like that of Aneryatet, n 

 wingless. 



