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 A HISTORY OF KENT DYTisciDi* (continued) Hydaticus seminiger, De G. (hybneri,Fab.). Very local, but occasionally com- mon. Lee Acilius sulcatus, L. Common Gyrinid^ Gyrinus elongatus, Aube. Rather com- mon. Rainham^ Gravesendy Whit- stahle. Deal — natator, Scop. Very common every- where — suffriani, Scriba. Rare. Sandwich (Sharp) — marinus, Gyll. Local ; found both inland and near the coast Orectochilus villosus, Mull. Very local, but not uncommon where it occurs ; found in the Ravembourne at Letuisham Hydrophilid.^ Hydrophilus piceus, L. Not uncommon where it occurs. Sheerness, Lee Hydrocharis caraboides, L. Common Hydrobius fuscipes, L. Very common — oblongus, Herbst. Brackish ditches ; local. Rainham, Gravesend, Sheer- ness, IVhitstahle, Deal Philhydrus testaceus, F. Not uncommon — maritimus. Common near the coast — nigricans, Zett. Not common. Plum- stead, Lee, Gravesend, Greenwich, etc. — melanocephalus, Ol. Local — coarctatus, Gredl. (suturalis, Sharp). Not uncommon Cymbiodyta ovalis. Thorns. Common Enochrus bicolor, Gyll. Local, but not uncommon Paracymus nigroaeneus, Sahl. Not com- mon. Lee Anacaena globulus, Payk. (limbata. Sharp.). Very common — limbata, F. (variabilis, Sharp.). Very common — bipustulata, Steph. Local. Lee Helochares lividus, Forst. Local. Sheerness — punctatus. Sharp. Common Laccobius sinnatus. Mots, (nigriceps, Thoms.). Not uncommon — alutaceus, Thoms. Probably widely distributed. Ramsgate, Deal — bipunctatus, F. Locally abundant. Gravesend, Folkestone, Deal [L. minutus, L., is usually recorded as abundant in the district, but I be- lieve that L. bipunctatus, F., has been confused with it. I have no record of L. minutus, L., as Dr. Sharp has determined it, from the London district or the southern counties] Hydrophilid^^ [continued) Berosus spinosus, Stev. Always in brackish ponds and ditches ; local. Sheerness, Sheppey — signaticollis, Sharp. Local. Lee, JVhitstable — luridus, L. Local. Lee, Rainham, Deal — affinis, Brulle. Common Limnebius truncatellus, Thoms. Not uncommon — papposus, Muls. Not uncommon — nitidus, Marsh. Local Chastarthria seminulum, Herbst. Com- mon Helophorus rugosus, Ol. Not uncommon — nubilus, F. Common — intermedius, Muls. Occasionally com- mon — aquaticus, L. Very common every- where var. acqualis, Thoms. With the type ; occasional — dorsalis. Marsh. Rare. Chattenden — aeneipennis, Thoms. Common — mulsanti. Rye. Not uncommon. Lee, Chatham, Rainham, Darenth Wood — affinis. Marsh. Generally common — brevipalpis. Bedel. Not uncommon — nanus, Sturm. Very local. Lee (Power) Hydrochus elongatus, Schall. Not un- common — angustatus, Germ. Common Octhebius exaratus, Muls. Chiefly in brackish ditches ; very local. Rain- ham, Gravesend, JVhitstable — margipallens, Latr. Chiefly in brackish ditches ; locally abundant — marinus, Payk. Brackish ditches ; com- mon near the sea — pygmaeus, F. Inland and maritime ; rather common — bicolon. Germ. Inland and maritime ; rather common — auriculatus, Rey. Locally common ; Isle of Sheppey — rufimarginatus, Steph. Inland and maritime ; not common. Sheerness, Strood, Maidstone — nanus, Steph. (aeratus, Steph.). Inland and maritime ; local — punctatus, Steph. Very local near the sea. Sheerness, Pegwell Bay Hydraena testacea. Curt. Scarce. Lee — riparia, Kug. Not common. Chatham and Rochester district Cyclonotum orbiculare, F. Common Sphaeridium scarabaeoides, F. Very com- mon everywhere