DYTlCIDiE. HYDROPORUS. 55 



ring in every brook, rivulet, &c. throughout the metropolitan di- 

 strict. " Wandsworth- common. " — Mr. Ingpen. " Very plentiful 

 throughout Cambridgeshire." — Rev. L. Jenyns. 



Sp. 13. proxiraus. Niger, opacus, capite antice, laterihus thoracis, pedibusque 



ferrugineis; elytris macula apicali pallida. (Long. corp. 1^ lin.) 

 Hy. proximus. Wilkin MSS.?— Steph. Catal p. 46. No. 451. 



Black, opaque : the head anteriorly, and the sides of the thorax, ferruginous : 

 the elytra black, with a pale arcuated spot towards the base : the legs fer- 

 ruginous. 



I conceive that this insect (which I first obtained from the late Mr. Griffin's 

 collection, by the above name) may be a mere variety of the foregoing : the 

 original specimen is in Mr. Vigors' cabinet. 



Near Norwich. " Arran, and near Spitchweek, Devonshire.' 1 — 

 Dr. Leach. 



Sp. 14. tristis. Oblongo-ovatus, subconvexus, angustior, niger, glaber, capite 

 elytrisque rufo-piceis, antennarum basi pedibusque ferrugineis. (Long. corp. 

 lj— U lin.) 



Dy. tristis. Paykul. — Hy. tristis. Steph. Catal. p. 46. No. 452. 



Oblong-ovate, subconvex, black; the entire surface beneath a strong gloss, 

 thickly and finely punctulate : head large, depressed, pitchy-red, with a dusky 

 patch between the eyes : thorax convex in the middle, anteriorly and poste- 

 riorly impressed, thickly punctate, slightly glossy : elytra ovate, a little convex, 

 shining pitchy-red, sometimes pale testaceous-red : body pitchy-black beneath, 

 rather deeply punctate : legs rusty-red : antennae with the base ferruginous : 

 the apex dusky. 



The colour of the thorax is sometimes pitchy-red. 



Found near London. « Kensington-gardens. ,, — Rev. F. W. Hope. 



Sp. 15. umbrosus. Oblongo-ovatus, subconvexus, niger, pubescens, capite pedi- 

 busque rufis, elytris rufo-piceis, posterius attenuatis. (Long. corp. 1 — l^lin.) 

 Hyp. umbrosus. Gyllenhal. — Hyd. umbrosus. Steph. Catal. p. 46. No. 453. 



Minute; oblong-ovate, subconvex, black, pubescent; beneath a powerful lens 

 thickly punctulate: head large, rounded, depressed, rusty-red, frequently 

 with a dusky cloud between the eyes : thorax transversely convex on the disc, 

 with a deep waved impression behind, slightly glossy : elytra oblong-ovate, 

 above a little convex, dull pitchy-red, pubescent ; body slightly glossy beneath, 

 black, punctulated : legs elongate, pale rufescent : antennae the same, with the 

 tip black. 



Taken near London, but rarely. 



B. With the sides of the thorax in continuity with those of the elytra. 



a. With the tip of the elytra somewhat truncate. 



