/ 



I^S G y r i n il /» v 



cata, angiilig rotundatis , fupra convexa, nigfo-eee- 

 rulea nitidlfnma , verfus margines virefcentia, fuhti- 

 Jiflime punck'to-{ln'ata; raargo inflexus fubtus pallide 

 teftaceus. Corpus fubtus nig,ro-aeneum nitidum, pe- 

 ^toris margine futurisqve teilaceis; Anus extra elytra 

 produ6lus feml-circularis , fupra nigro-coerulefcens , 

 fubtus ferra^ineus. Pedes. palllde ferrut^inei, antici 

 elongati, pofteriores 4 breviffimi, comprefTi, natatorii* 



2. G. bicolor: oblongus fub-cylindricus, 



nigro - ccerulefcens, glaberrimus, elytris 

 fubtiliflime pundtato-ftriatis, margine in- 

 flexa pedibusque ferrugineis» 



'Fabr, fyfi, eleut* !♦ ^74. 2. PatjL Jn. i» sjj?. ^. 



• Habitat in aquls Finlandice paffimj Donu 



Pfeif Ef Sahiherg. 



TDefcr. Vix iatidudinem foemin^spra^cedentis attin- 

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

 vix in medio dilatatus; casterum prsecedenti fimilli- 

 mus , totus nigro - coerulefcens nitidus , futura lateri- 

 busqve viridi-seneis. Caput, thorax & fcutellum ut 

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

 rius parum attenuata, apice truncata, angulis rotun- 

 datis; fupra fubtiliffime punclato-ftriaca, margine in- 

 flexo pallide teftaceo. Abdomen fubtus nigro-aene- 

 um, fegmento ani concoJore, apice piceo» Pedes 

 rufo-teftacei* 



3. G. dorfalisr oblongo-ovalis nigro fub- 



seneus, elytris fortius pundlato - ftriatis, 

 difco terrugineis, margine infiexo nigroi 

 ; eeneo. 



Habitat in aquis rarius; Dom, dc PayMU^ 

 mYinhniX^ D, Sahlberg. • 



Defer; 



y 



