I ^ft G y r i 11 u ,r. 



cata, anguHs rotundatis , fupra convexa, nigfo-Me^ 

 rulea nitidifftma , verfus margines virefcentia , fubti- 

 liflime pun6teto - ftriata; margo inflexus fubtus pallide 

 teftaceus. Corpus fubtus nigro-seneum nitidum, pe- 

 6fcoris margine futurisqve teftaceis; Anus extra elytra 

 produclus femi - circularis , fupra nigro - ccerulefcens , 

 fubtus ferrugineus. Pedes pallide ferruginei, antici 

 elongati, pofteriores 4 breviffimi, comprefii, natatorii* 



2. G. bicolor: oblongus fub - cylindricus, 



nigro - ccerulefcens, glaberrimus, elytris 

 fubtiliffime pundlato-itriatis, mafgine in- 

 flexa pedibusque ferrugineis. 



Fabr. fyft. eleut. 1. 274. 2. Payk. jn. 1. 2jp. $• 



Habitat in aquis Finlandite paffim; Dotu* 

 Pfelff & Sahlberg. 



tDefcr. Vix latidudinem fceminse prsecedentis attin» 

 git, fed dimidio longior & ultra, fere linearis, aut 

 vix in medio dilatatus ; cseterum praecedenti flmilli- 

 mus , totus nigro - coerulefcens nitidus , futura lateri- 

 busqve viridi-aeneis. Caput, thorax & fcutellum ut 

 in G. natatore omnino, Elytra valde elongata , pofte- 

 xius parum attenuata, apice truncata, angulis rotun- 

 datis; fupra fubtiliflime pun&ato-ftriata, margine in- 

 flexo pallide teftaceo. Abdomen fubtus nigro-sene- 

 um, fegmento ani concolore, apice piceo, Pedes 

 rufo-teftacew 



3. G. dorfalis: oblongo-ovalis nigro fub- 



ceneus, elytris fortius pun&ato - ftrbtis* 

 difco ferrugineis, margine inflexo nigro- 

 csneo. 



Habitat in aquis rarius; Dom. de Paykulty 

 in Finlandia D f SMberg. 



Defer> 



