320 PTILOTA : PHYSIOLOGY AND 



Now these varied phenomena are manifested to us in an 

 endless variety of methods; in the affection of insects for 

 their offspring; in the numerous distinct modes in which the 

 parent insect deposits her eggs in the most appropriate sitUa- 



Fiir 7. Section of the neit of Trrmn falalf, on a ttale of one inch to eight teet-a, the 

 royal chamber , the apartments of the royal attendants c c, the uurieriei mid maga- 

 linei extending up the >ide> of the neit rf, the lower roof <-. the upper roof/, two 

 bridget reaching from apertures in the lower roof to some of the upper imricriet g, the 

 hollow dome * , the thick mud walls of the building, penetrated In various dirertioiil 

 by outages, i i, of varioui t iie>, chiefly in a spiral direction from the bottom of the ucl 

 to the upper parts k, one of the great under-ground outlet* of the nest. 



tions ; in the construction of nests ; in the various stratagems 

 by which insects procure their food ; in the modes of defence 

 employed by insects either against their ordinary enemies or 

 accidents ; but, more than all, in the varied economy of so- 

 cial insects bees, humble-bees, wasps, ants, white ants. 

 All these varied phenomena appear, however, to be resolv- 

 able to two principal heads the continuance of the sptvii's. 

 and the preservation of the individual : indeed, the great 

 end and final care of the endless labours of the social insects 

 can only be traced to one or the other of these causes. 



If we confine our attention to the first of these grounds of 

 inquiry, viz. the perpetuation of the species, we find that 

 here, as elsewhere, the great command " Increase and raulti- 



