()n Aquatic Carnivorous Coleoptera or DytisciihB. 471 



598. Hydroporus morio, Dej., M.C. — Ovalis, parcius seel evidenter pubescens, 

 niger, pedibus fuscis vel fusco-rufis, antennarum basi minus laete rufo ; prothorace 

 anterius angusfcato, basi fortiter punctato, disco sub-elevato sparsitn subtiliter 

 punctate ; elytris parcius distincte punctatis ; coxis posterioribus sparsim minus 

 profunde punctatis. Long. 3s, lat It m.m. 



Mas, tarsis anterioribus et intermediis magis dilatatis, illis unguiculis majoribus, 

 anteriore medio angulatim dilatato. 



Fern., (a.) ut in mare nitida. 

 (b.) opaca. 



This species usually is represented in catalogues under the name of Hydroporus 

 melanocephalus, Marsh., Steph.; but as the descriptions of the authors referred to 

 almost certainly were not made from this species, it is better to adopt the name 

 proposed by Dejean and brought into general use in the Munich Catalogue. 



Europe ; Siberia ; North America. (Finland 60° north, Sahlberg ; Scotland ; Eiesengebirge ; Pyrenees ? 

 Schaum ; White Mountains, New Hampshire). 358. 



599. Hydroporus gyllenhalli, Schiodte, Dan. El. p. 434. — Oblongo-ovalis, 

 convexiusculus, nitidus, fere glaber, fortiter punctatus, castaneo-piceus, pectore 

 abdomineque nigris, pedibus antennisque rufis ; pi'othorace disco sat crebre 

 evidenter punctato ; coxis posterioribus sparsim evidenter punctatis. Long. 3^, 

 lat. 2 m.m. 



I can see no sexual distinctions in this species, all the specimens I have examined 

 have the tarsi rather broad. 



Europe; (Sweden, Finland, Scotland, basin of the Seine, Eeynosa, Cantabrian Mountains.) 357. 



600. Hydroporus notatus, Sturm, M.C. — Oblongus, parcius punctatus et 

 pubescens, subtus nigricans, pedibus rufis, antennis rufescentibus, basi rufo ; capite 

 permagno, rufescente, medio fusco-umbroso ; thorace fusco-nigro lateribus rufescen- 

 tibus, basi punctis sparsis, magnis, medio fere impunctato ; elytris fuscis, b.isi 

 lateribusque vage rufescentibus, parcius minus fortiter punctatis ; coxis posterioribus 

 fortiter punctatis. Long. 3, lat. li m.m. 



The male has the front and middle tarsi broader than in the female, llie 

 species is closely allied to Dytiscus tristis (No. 602), but no doubt distinct. 



Europe. (Germany, and Southern Scandinavia). 356. 



601. Hydroporus elongatulus, Sturm, M.C. — Oblongus, minus angustus, vix crebre 

 pubescens, nigricans, pedibus rufis, antennis fusco-rufis, basi dilutiore, capite 

 elytrisque rufo-fuscis, illo anterius dilutiore ; prothorace basi fortiter punctato 



