464 On Aquatic Carnivorous Coleoptera or Dytiscidce. 



testaceis, elytris signaturis basalibus et externis pallidls ; coxis posterioribus crebre 

 sat fortiter punctatis ; abdomine segmento apicali densius pubescente, sed margine 

 summo nudo denseque rugoso punctato. Long. i\, lat. 23 m.m. 



The male has the front and middle tarsi broader than the female. The species 

 is extremely closely allied to D. planus, but the yellow marks at the base of the 

 elytra are distinct and definite and there is a little difference in the sculpture and 

 pubescence of the last ventral segment. The species appears to be variable accord- 

 ing to locality ; the individuals from Andalusia have the pubescence less white and 

 conspicuous than those fi-om the South of France ; a variety from Corsica, (H. 

 bonnairei, Fairm.) is remarkable from the very conspicuous pubescence ; T have 

 however only seen a single specimen of it. 



Southern Europe, Corsica ; Northern Africa, (Andalusia, Algeria). 377. 



577. Hydroporus brucki, Wehncke, Deutsch. Ent. Zeit. 1875, p. 234. — Ovalis, 

 minus, convexus, evidenter pubescens, crebre vix fortiter punctatus, niger, capite 

 rufescente medio late infuscato, j^rothorace lateribus anguste testaceis, basi 

 lateribusque plus minusve vage testaceis, antennis pedibusque rufis, coxis poste- 

 rioribus fortiter punctatis ; abdomine segmento apicali minus dense pubescente 

 apice dense punctato. Long. 4|, lat. 2^ m.m. 



I have only seen two individuals in bad condition of this species ; it appears to 

 be extremely closely allied to Dytiscus planus (No. 575). 



South Eastern Europe ; (Crimea). 376. 



578. Hydroporus limbatus, Aube, M.C. — Oblongo-ovalis, sat convexus, evidenter 

 sed baud dense pubescens, nitidus, fortiter punctatus, niger, capite rufescente medio 

 late infuscato, prothoracis lateribus, elytris signaturis basalibus et marginalibus, 

 antennis j^edibusque testaceis ; coxis posterioribus fortiter profundeque punctatis ; 

 abdomine segmento apicali baud pubescente, fortiter sed haud dense punctato. 

 Long. i\, lat. 2\ m.m. 



The sexual characters appear very slight. The species is allied to Dytiscus 

 planus (No. 575), but is more coarsely punctured, and the upper surface is more 

 variegated ; it varies in size and form, to a considerable extent, some individuals 

 being nearly similar in these respects to D. planus, while others are narrower and 

 more convex ; the yellow markings at the base and outer margin of the elytra also 

 vary in their extent and definition. 



Corsica, Sardinia and south of Spain. 37t"). 



579. Hydroporus analis, Aube, M.C. — Ovalis, sat convexus, crebrius evidenter 

 pubescens, sat nitidus, niger, capite anterius et in vertice rufescente, prothorace 



