On Aquatic Carnivorous Coleoptera or Dytincidce. 443 



The only two specimens I have seen are no doubt males, though the front tarsi 

 are but slender. The coxal lines are very nearly parallel in this species. 



North America, (ex Mus. Dejean.) 280. 



514. Hydroporus vitiosus, Lee, M.C — Ovalis, sat elongatus, fere depressus, parce 

 pubescens, sat nitidus, feirugineus, prothorace basi elytrisque obscurioribus, his 

 signaturis rufis vagis, sat crebre sed vix fortiter punctatis, coxis posterioribus sat 

 fortiter et sat crebre punctatis. Long. 3h lat. vix 2 m.m. 



The only individual I have seen is no doubt a male, though the front tarsi are 

 quite slender ; according to Crotch the female is " very closely punctate." 



The species is closely allied to H. proximus, but is more elongate and depressed, 

 and has the punctuation of the hind coxaj less, and the coxal lines more divergent 

 at their apex. 



North America. 281. 



515. Hydroporus vittatus, Lee, M.C. — Ovalis, parcius tenuiter pubescens, niti- 

 dulus, testaceus, prothorace antice et postice elytrisque fuscis, his vittis duabus 

 longitudinalibus testaceis, sat crebre subtiliter punctatis ; prothorace tenuiter 

 marginato ; coxis posterioribus sat fortiter fere sparsim punctatis. Long. 4, lat. 

 2i m.m. 



The only individual I have seen is a male, it has the front and middle tarsi 

 moderately dilated, and the claws of the front ones unequal, the anterior being a 

 little shorter and thicker. The coxal lines are a little divergent both in front and 

 at the extremity. 



North America ; (Fort Laramie). 283. 



516. Hydroporus sericeus, Lee, M.C. — Ovalis, minus elongatus, testaceus, pro- 

 thorace antice et postice elytrorumque vittis fuscis ; jjrothorace omnino tenuiter 

 marginato ; coxis posterioribus dense sub-fortiter punctatis. Long. 4, lat. 2^ m.m. 



The only individual I have seen is a female, the upper surface bears a dense fine 

 yellow pubescence, and the sculpture is quite obsolete. The coxal lines are scarcely 

 divergent at the apex. 



North America, (Lake Superior ; Illinois sec. Crotch). 284. 



517. Hydroporus dimidiatus, Har., M.C. — Ovalis, densius brevissime pubescens, 

 opacus vel subopacus, testaceus, elytris lineis hinc inde praesertim ante apicem 

 dilatatis et conjunctis nigris ; densius subtilius punctatis; prothorace margine baud 

 tenui; coxis posterioribus dense fortiter punctatis. Long. 4, lat. 2i m.m. 



TRANS. BOY. DUB. SOC, N.S., VOL. II. 3 SI 



