4 2 PLATE XVIII. 



June, and thence to September or later; they are voracious, and feed 

 on other aquatic animals, grafping their prey between their fore feety 

 and tearing them to pieces with their fharp roftrum. — They fly in the 

 evening, and thus remove in herds from one pool to another when 

 danger approaches* 



It is fuppofed by fome authors, that the fore feet of the nepa are the 

 antennae, and if this be admitted, the InfecT: hath only four feet ; but- 

 if eonfidered defcitute of its antennae, it hath fix. 



