236 UYDRoruiLiDiE. \_Heh>i>hurus. 



K. rug"OSUs, 01. {rufipes, Bosc). Oblong oval, rather broad; head 

 reddish, granulate ; thorax very transverse, dark, with reddish' sides, 

 silicate and strongly ridged, the "ridges interrupted and broken up into 

 small knobs, anterior angles prominent ; elytra brownish testaceous with 

 distinct dark markings, hardly broader than thorax, almost parallel- 

 sided, with plainly punctured striae, alternate interstices strongly raised 

 in ridges ; near the suture at base are two short ridges ; legs testaceous. 

 L. 5-5i mm. 



Rather local, but widely distributed throughout Eughind and Wales, botli in- 

 land and near the coast; not so counnon towards the north; Scotland, scarce. 

 Lowlands, Tweed, Forth, Solway, and Dee districts. 



K. nubilus, F. (costatus, Goeze), Very like the preceding, but 

 much smaller, duller, and more unicolorous ; thorax sulcate, interstices 

 evenly raised in ridges, the ridges not interrupted, rather broader in 

 proportion than the thorax of H. rugosus ; elytra duller with the black 

 markings not so apparent ; legs reddish-brown. L. 3-3| mm. 



Common and widely distributed in England. Scotland, local, Lowlands, Tweed, 

 Forth, Tay, and Solway districts. Ireland, near Belfast and Waterford. 



This species and the preceding prefer sandy places near water ; the 

 latter species, however, is often found in heaps of decaying rubbish or 

 under leaves, or even by sweeping herbage, far from water. M. Ferris 

 has discovered the larva of one of these species of the sub-genus Em- 

 pleurus in cabbage stalks devouring the larvae of Halticida^. 



H. intermedius, Muls. Oblong, moderately convex, shiny ; 

 head and thorax more or less iridescent, the latter with the sides testa- 

 ceous yellow, somewhat rounded in front and thence straight to base ; 

 interstices of thorax finely granulate ; elytra brownish testaceous Avitli 

 irregular dark markings, with ten moderately strongly punctured striai 

 on each, the alternate interstices distinctly but not strongly raised in 

 ridges ; legs testaceous : the species somewhat resembles a small //. aqua- 

 ticus, from which it may be separated by the plairdy raised ridges on 

 elytra. L. 4-5 mm. 



Local ; brackish and fresh water ; Sheerness, Ruiuham, Gravesend, Whitstable, 

 Merton (Surrey); Hastings; Walton-ou-Naze ; Glauvilles Woottou ; Brighton; Deal; 

 Liverpool district. 



. K. aquaticus, L. (gra7idis, 111.). Oblong ; head and thorax iri- 

 descent (greenish bronze or coppery), more shining in male than female ; 

 antennae and palpi testaceous, tip of latter often dark ; thorax with in- 

 ternal furrows angular, with round granulations, which are sometimes 

 less distinct on disc ; elytra rather broader at base than base of thorax, 

 disc rather flat, with a rather strong broad depression a little before base, 

 dark testaceous with more or less distinct dark markings ; on each elytron 

 are ten rather strongly punctured stria?, Avith the punctures round, 

 gradually weaker towards apex ; between the first and second striie at 



