38 ORDER I. Gyrinus. 



Genus VI. Gyrinus. 



Linn. Syft. Nat. page 567. 

 The antennae of this infect are club- 

 formed, ftiff, and fhorter than the head. 



It has four eyes, two on the upper, and 

 two on the under fide of the head. 



Geoffroy adds to the above characters that the 

 feet are natatorii or formed for fwimming. 



Scopolihas arranged the Gyrinus along with 

 the Dytifci, from which it differs eiTentially in 

 the number of its eyes and the form of its anten- 

 nas; thefe indeed in fome of the Dytifci are 

 clubbed, but the club is perforated, nor are the 

 antennas ftiff as in the Gyrinus. 



The infect called the Water-flea belonging to 

 this genus, is very frequently met with in Hand- 

 ing waters, and eafily diftinguilhed by its fhin- 

 ing black colour, and the fwiftnefs and circular 

 direction of its motion in fwimming. 



I do not know that its larva has yet been ob- 

 ferved, but it may probably be found along with 

 that of the Dytifcus, which without doubt it 

 refembles. 



Genus 



