438 On Aquatic Carnivorous Coleoptcra or Dytiscidce. 



The coxal cavities are distinctly not contiguous, and the coxal lines are very 

 little divergent in front. 



North America, (Canada, Illinois, Nebraska, fide Crotch). 291. 



498. Hydroporus pulcher, Lee, M.C. — Oblongo-ovalis, parcius subtiliter pubes- 

 cens, vix nitidus, obsolete baud dense punctatus, rufescens, subtus infuscatus 

 pectore apice medio dilutiore, supra prothoraco (medio excepto) elytrisque fuscis, 

 his fasciis latis, vagis, interruptis testaceis ; elytris stria suturali distincta ; coxis 

 posterioribus minus crebre, sat fortiter sed subobsolete punctatis. Long. 3|, lat. 

 vix 2 m.m. 



I do not know the sex of the only individual I have seen. The coxal cavities 

 are evidently not quite contiguous ; the coxal lines are very little divergent 

 in front. 



North America, (Pennsylvania). 289. 



499. Hydroporus integer, n. sp. — Oblongo-ovalis, subtiliter pubescens, vix nitidus, 

 obsolete punctatus, fuscus, subtus pectore apicem versus, capite, antennis pedi- 

 busque, etiam prothorace medio et lateribus rufescentibus, elytris fascia vaga 

 sub-basali signaturisque externis testaceis ; coxis posterioribus minus crebre, sat 

 fortiter sed sub-obsolete punctatis. Long. 3J, lat. 2 m.m. 



I do not know the sex of the only individual I have seen. The coxal cavities 

 are evidently not quite contiguous ; the coxal lines are more divergent in front 

 than they are in H. pulcher, to which species H. integer] is extremely similar. 



North America, (Pennsylvania). 290. 



500. Hydroporus vittatipennis,Har.,M.C. — Ovalis, subtiliter pubescens, nitidulus, 

 testaceus, elytris vittis pluriuiis elongatis plus minusve confluentibus fuscis, obsolete 

 punctatis ; coxis posterioribus obsolete punctatis ; prothorace margine laterali 

 tenuissimo. Long. 3, lat. H m.m. 



I do not know the sex of the only individual I have seen of this species, the front 

 tarsi are small, their third joint but little developed. The species in most points 

 of its structure appears allied to H. concinnus, Lee. (No. 497) although it has the 

 lateral margin of the thorax very fine even in front ; the coxal cavities are distinctly 

 not contiguous. 



This species was described by Leconte under the name of H. lineolatus, but the 

 name has been changed by Harold on account of the prior H. lineolatus. Boh. 



North America. 292. 



