Monoculus. A P T E R A. 



*57 



Genus XI, Monoculus. 



Li^n. Syft. Nat. page 1057. 



The feet of the Monoculus are made 

 for fwimming. 



The body is covered with a cruft, or 

 {hell. 



The eyes are fixed in the (hell, very 

 near one another. 



The infects belonging to this genus have ge- 

 nerally been thought to have two eyes, but 

 placed fo near to one another as fcarce to be dif- 

 tinguiflied ; Geoffroy however afferts, that fe- 

 veral of them have in fact only one eye ; to thefe 

 he has preferved the name of Monoculus. Thefe 

 are likewife farther diftinguifhed by their an- 

 tennae, which in fome are divided and fubdivi^ed 

 into branches, like plants, with feveral lateral 

 hairs, in others are more than two in number. 

 To the remaining ones, in which two eyes are 

 plainly perceptible, he has given the generical 

 name of Binoculus -, the antenns in this genus 

 are fetaceous, and the tail forked. The feet, ac- 

 cording to the fame author, are fix in number 



R (in 



