HETEROCERA. 



185 



to the family Pyralidae, to which practically fifty per cent, of the total number 

 of species listed belong. 



In concluding these introductory remarks I should like to make this the 

 occasion of thanking Professor Buxton for the opportunity of working through 

 the material dealt with in the following pages. The task has taken much longer 

 than was anticipated and has perhaps unduly delayed the completion of the 

 whole survey. This was, however, inevitable. Unforeseen difficulties of 

 taxonomy and nomenclature were encountered at every step, the complete 

 solution of which involved investigations reaching far beyond the immediate 

 scope of this work. If all these had been pursued to their ultimate solution, 

 this work would never have appeared, and I have therefore been regretfully 

 compelled to leave some matters still in a state of taxonomic uncertainty. These 

 are duly indicated where they occur. 



Ill (4) 



2 



