DYTICIDiE, HYDROPORUS. 61 



Sp. 31. flavipes. Ovatus, subdepressus, niger, pubescens, elytris fuscis basi mar- 



gineque testaceis, pedibus pallide ferrugineus. (Long. corp. 1^ — 1| lin.) 

 Dy. flavipes. Fabricius. — Hyd. flavipes. Steph. Catal. p. 47. No. 469. 



Ovate, slightly depressed, black, pubescent, thickly but finely punctulate : head 

 with two deep frontal impressions : thorax with the disc transversely convex : 

 elytra fuscous, with the base and margin testaceous : body deep glossy black 

 beneath : legs pale ferruginous. 



The base and margin of the elytra are sometimes broadly testaceous. 



Not uncommon in stagnant waters near London, at Hertford and 

 Ripley; also in Norfolk. " Netley, Salop, and Southend." — Rev. 

 F. W. Hope. " Wandsworth-common." — Mr. Ingpen. " Of fre- 

 quent occurrence in ditches near Ely, and elsewhere." — Rev. L. 

 Jenyns. 



Sp. 32. ater. Ovatus, subdepressus, niger, antennis pedibusque omnino ferru- 



gineis. (Long. corp. 2 lin.) 

 Dy. ater. Forster ?— Hyd. ater. Steph. Catal. p. 47. No. 470. 



Ovate, subdepressed, black ; with the antennae and legs entirely ferruginous. 

 I suspect that the above is an immature state, or a variety of the following 

 species. 



Taken in pools near London. 



Sp. 33. holosericeus. Ovatus, subdepressus, niger, pubescens, antennarum basi 



pedibusque ferrugineis. (Long. corp. 2 lin.) 

 Dy. holosericeus. Mar sham. — Hyd. holosericeus. Steph. Catal. p. 47. No. 471. 



Ovate, slightly depressed, black, pubescent : head with the margin of the crown 

 glabrous, ferruginous: thorax slightly convex above, and entirely black: 

 elytra black, very pubescent, thickly punctulated, the lateral margin and base 

 generally paler: body shining black beneath, punctulated: the legs ferru- 

 ginous : antennae ferruginous at the base, the tip dusky. 



Very common near London ; also found in Norfolk. " Wands- 

 worth-common." — Mr. Ingpen. " Frequent in ditches near Ely, 

 and elsewhere." — Rev. L. Jenyns. 



Sp. 34. pubescens. Ovalis, planus, niger, pubescens, antennarum basi pedibusque 



ferrugineis, elytris testaceis, stria disci punctata. (Long. corp. l| — 2 lin.) 

 Hyp. pubescens. Gyllenhal. — Hyd. pubescens. Steph. Catal. p. 48. No. 472. 



Oval, flat, black 3 very pubescent, finely and thickly punctate: head ferruginous 

 towards the crown : thorax anteriorly and posteriorly impressed transversely : 

 elytra ovate, much depressed, deep testaceous, much punctulated, and strongly 

 pubescent, the disc with an abbreviated stria of larger impressions: body 

 pitchy-black beneath, rather deeply punctulated : legs ferruginous, the femora 

 sometimes dusky : antennae ferruginous at the base, blackish at the apex. 



