28 



Journal of the Asiatic Society of Bengal. [January, 1907. 



relationsliip to H. grisea similar to tliat which H. dicacia "bears to 

 H.fiisca ; "but there is this difference : while H, fasca and H, dicecia 

 occur together, H. orientally has not been recorded from the same 

 localities as fl", grisea and undoubtedly occurs apart from it. 

 Whether it is a constant race or only a phase produced by the 

 direct effect of climate on the individual could only be proved by 



It would be interesting to hatch eggs of the 

 European H. grisea in Bengal, or to do the same with eggs of 

 S. orientalis in Europe. The former experiment would probably 

 bemoi'e easy to carry out than the latter, because of the rarity of 

 the eggs of H, orientalis and their feeble vitality. It is to be 

 hoped that it may be possible to make arrangements for such 

 attempt. 



experiment. 



t 



1 



