LOUSE. 
455 
particular species : some are also observed on 
fishes and insects. It is hardly to be expected 
that their exact history will ever be distinctly 
known; and it may be considered as sufficient to 
point out a few of the most remarkable kinds. 
Many of these have been long ago observed by 
the industry of Redi, from whose work on Insects 
several of the figures here introduced are copied, 
their respective names being inscribed under each 
particular species. 
