9 6 INSECTS. COLEOPTERA. 9. Gyrinus. 



Thefe are to be found on the furface of waters, on which they 

 run and defcribe circles with great celerity ; when attempted 

 to be taken, they plunge to the bottom, drawing after them 

 a bubble reiembiing a giolube of quickfilver. 



*Natator. Oval, faintly ftriate, black. 



Geoff. Inf 1. p. 194, tab. 3 fig. ^ 

 Inhabits ftagnant pools of Europe. 



Bicolor. Black, beneath ferruginous : hind-legs comprefTed. 



Inhabits Sweden: larger than the laft. 



Aufiralis. Subftriate, greenilh : fhells abbreviated, 1 -toothed. 

 Inhabits Ne<w Holland. 

 Shells truncate : 4 h<nd-iegs ferruginous. 



Ameruanus Smooth, black, opake : 4 hind-legs fhort, teflaceous. 

 Inhabits America j larger than the lait. 



Micans. Smooth, olive, polifhed ; fhells with a glofly band behind. 

 Inhabits Guinea, the largeft of its tribe. 



Body olive, with a coppery and filvery glofs, beneath black : 

 btndlegr teflaceous. 



Spinofus. Black, polifhed: thorax and fhells edged with yellow: 

 fhells fpinous. 



Inhabits Coromandel. 



Shells with 2 long fharp fpines : body beneath ferruginous : tail 

 black. 



Striatus. Green, polifhed: edges of the thorax and fhells pale: (hells 

 ftriate, 

 Inhabits Barbary. Thunb. AW. Inf. 1, 27. 

 Antenna green: Headbraffy green: front fometime? x\o\zt:fielIs 

 ftriate with green and violet, rounded at the tip : legs pale. 



Groffus* Beneath black : above paler, very fmooth : fhells rounded at 

 the tip. 

 Inhabits clear waters of the Cape of Good Hope. 



Formofus. Beneath black ; breaft, fternum and legs ferruginous ; above 

 brafTy green : tranfverfe line on the lip, 2 fpots on the 

 front, tranfverfe interrupted line on the thorax, and 

 ftreaks on the fhells gold red. 

 Inhabits clear w*ater of the Cape of Good Hope. 



Orientalis* Beneath pale ferruginous, above brafTy -black: fhells each fid< 

 compreiTed, flightly ftriate, bronzed, 4-toothed behind 



Body ritwT0jb : juells as long as the body. 



Beneath 



