Species and family descriptions
These pages attempt to provide some basic knowledge of the species featured. We make no apology for covering well worked ground because we want the site to be of use to beginners as well as experienced coleopterists. Families are introduced with a brief description allowing the user to place a specimen with confidence, we have tried to keep these simple and to this end our series of featured species are pictured. Within these descriptions links are included enabling closely similar families to be separated. Of course this is no substitute for a comprehensive key but we hope that by going through these series others will be able to place the great majority of frequently encountered species. Our pictures have been chosen and presented in such a way as to allow, along with some guidance, a correct ID should the species concerned be found. A description is provided so that the important features will not be overlooked when comparing your specimen to our pictures; these descriptions have been written by taking the diagnostic features from a range of keys and with our own specimens before us i.e. none of our descriptions rely solely on the literature. Our only misgiving being that our descriptions are based purely on local material, where regional variation is known this has been noted. We can thus leave others safe in the knowledge that their specimen, so far as we know, is what we say it is rather than something closely similar.

Some similar species are best identified by having examples of both together for comparison, with some the underside may need to be examined while others (quite a few) will need to be dissected. We often use these methods and some of our more critical work is given in the ID Aids section.

Collecting for its own sake is quite rightly to be frowned upon, on the other hand a collection of correctly identified specimens becomes valuable, in the scientific sense, if the data are submitted to the various recording schemes and the specimens are preserved and, ultimately, donated to a museum. It must also be realised that the British checklist is dynamic; new species find their way into the UK and , following modern research, established species may ‘split’ into two or more species. Thus without well preserved reference material many historical records may lose much of their value. e.g. Pterostichus nigrita (PK) and Pterostichus rheaticus Heer.

Almost all the species on our website were recorded from the Watford area, however, we will feature species recorded from elsewhere, on the species page this will be indicated by a light blue banner rather than our signature gold.

All the specimens pictured on the following pages have been identified by the WCG, that is to say that from whatever source the specimens originated, unless otherwise stated, they have been verified by Mr. D.Hodges and/or Mr. D.Murray.
Aderidae
Alexiidae
Anthicidae
Anthribidae
Apionidae
Attelabidae
Biphyllidae
Bothrideridae
Buprestidae
Byrrhidae
Byturidae
Cantharidae
Carabidae
Cerambycidae
Cerylonidae
Chrysomelidae
Ciidae
Clambidae
Cleridae
Coccinellidae
Colydiidae
Corylophidae
Cryptophagidae
Cucujidae
Curculionidae
Dascillidae
Dasytidae
Dermestidae
Derodontidae
Dryophthoridae
Dryopidae
Dytiscidae
Elateridae
Elmidae
Endomychidae
Erirhinidae
Erotylidae
Eucnemidae
Georissidae
Geotrupidae
Gyrinidae
Haliplidae
Helophoridae
Heteroceridae
Histeridae
Hydraenidae
Hydrophilidae
Hygrobiidae
Kateretidae
Laemophloeidae
Lampyridae
Latridiidae
Leiodidae
Lucanidae
Lycidae
Lymexylidae
Malachiidae
megalopodidae
Melandryidae
Monotomidae
Mordellidae
Mycetophagidae
Nanophyidae
Nitidulidae
Noteridae
Oedemeridae
Orsodacnidae
Phalacridae
Platypodidae
Ptinidae
Pyrochroidae
Raymondionymidae
Rhynchitidae
Salpingidae
Scarabaeidae
Scirtidae
Scraptiidae
Silphidae
Silvanidae
Sphaeriusidae







Staphylinidae
 Family Overview
Subfamily Omaliinae
 Eusphalerum luteum (Marsham)
 Eusphalerum primulae (Stephens)
 Lesteva longoelytrata (Goeze)
 Lesteva punctata Erichson
 Lesteva sicula Erichson
 Olophrum piceum (Gyllenhal)
 Omalium italicum Bernhauer
 Omalium rivulare (Paykull)
 Philorinum sordidum Stephens
Subfamily Proteininae
 Megarthrus denticollis (Beck)
 Megarthrus depressus (Paykull)
 Metopsia clypeata (Muller, P)
 Proteinus brachypterus (Fabricius)
Subfamily Pselaphinae
 Rybaxis longicornis (Leach)
 Trichonyx sulcicollis (Reichenbach)
Subfamily Tachyporinae
 Cilea silphoides (Linnaeus)
 Ischnosoma splendidum (Gravenhorst)
 Lordithon lunulatus (Linnaeus)
 Lordithon trinotatus (Erichson)
 Sepedophilus immaculatus (Stephens)
 Sepedophilus littoreus (Linnaeus)
 Sepedophilus marshami (Stephens)
 Tachinus humeralis Gravenhorst
 Tachinus lignorum (Linnaeus)
 Tachinus marginellus (Fabricius)
 Tachinus rufipes (Linnaeus)
 Tachyporus chrysomelinus (Linnaeus)
 Tachyporus hypnorum (Fabricius)
 Tachyporus nitidulus (Fabricius)
 Tachyporus obtusus (Linnaeus)
 Tachyporus pallidus Sharp
 Tachyporus solutus Erichson
Subfamily Aleocharinae
 Aleochara curtula (Goeze)
 Aleochara lanuginosa Gravenhorst
 Alianta incana (Erichson)
 Aloconota gregaria (Erichson)
 Amischa analis (Gravenhorst)
 Autalia impressa (olivier)
 Autalia longicornis Scheerpeltz
 Autalia rivularis (Gravenhorst)
 Bolitocharus bella Markel
 Bolitocharus lucida (Gravenhorst)
 Bolitocharus obliqua Erichson
 Callicerus obscurus Gravenhorst
 Cypha longicornis (Paykull)
 Dinaraea aequata (Erichson)
 Drusilla canaliculata (Fabricius)
 Encephalus complicans Stephens
 Geostiba circellaris (Gravenhorst)
 Gynpeta rubrior Tottenham
 Gyrophaena gentilis Erichson
 Hygronoma dimidiata (Gravenhorst)
 Leptusa ruficollis (Erichson)
 Mocyta fungi (Gravenhorst)
 Myrmecocephalus concinnus (Erichson)
 Oxypoda elongatula Aube
 Tachyusa concinna Heer
Subfamily Scaphidiinae
 Scaphidium quadrimaculatum Olivier
 Scaphisoma agaricinum (Linnaeus)
 Scaphisoma boleti (Panzer)
Subfamily Piestinae
 Siagonium quadricorne Kirby
Subfamily Oxytelinae
 Anotylus complanatus (Erichson)
 Anotylus inustus (Gravenhorst)
 Anotylus rugosus (Fabricius)
 Anotylus sculpteratus (Gravenhorst)
 Anotylus tetracarinatus (Block)
 Bledius spectabilis Kraatz
 Carpelimus elongatulus (Erichson)
 Oxytelus laqueatus (Marsham)
 Platystethus arenarius (Fourcroy)
 Platystethus capito Heer
 Syntomium aeneum (Muller, P.J.W.)
Subfamily Oxyporinae
 Oxyporus rufus (Linnaeus)
Subfamily Scydmaeninae
 Euconnus hirticollis (Illiger)
 Scydmaenus tarsatus (Muller and Kuntz)
Subfamily Steninae
 Stenus aceris Stephens
 Stenus bifoveolatus Gyllenhal
 Stenus bimaculatus Gyllenhal
 Stenus cicindeloides (Schaller)
 Stenus comma LeConte
 Stenus flavipes Stephens
 Stenus fornicatus Stephens
 Stenus fulvicornis Stephens
 Stenus juno (Paykull)
 Stenus latifrons Erichson
 Stenus melanarius Stephens
 Stenus ossium Stephens
 Stenus picipes Stephens
 Stenus providus Erichson
 Stenus solutus (Erichson)
Subfamily Paederinae
 Lathrobium pallidum Nordmann
 Lathrobium terminatum Gravenhorst
 Paederus riparius Linnaeus
 Rugilus rufipes Germar
 Sunius propinquus (Brisout)
Subfamily Staphylininae
 Atrecus affinus (Paykull)
 Bisnius fimetarius (Gravenhorst)
 Creophilus maxillosus (Linnaeus)
 Gabrius splendidulus (Gravenhorst)
 Gyrohypnus fracticornis (Muller)
 Megalinus glabratus (Gravenhorst)
 Nudobius lentus (Gravenhorst)
 Ocypus aeneocephalus (De Geer)
 Ocypus olens (Muller)
 Ontholestes murinus (Linnaeus)
 Othius punctulatus (Goeze)
 Othius subuliformis (Stephens)
 Phacophallus parumpunctatus (Gyllenhal)
 Philonthus albipes (Gravenhorst)
 Philonthus cognatus Stephens
 Philonthus cruentatus (Gmelin)
 Philonthus decorus (Gravenhorst)
 Philonthus laminatus (Creutzer)
 Philonthus marginatus (Muller)
 Philonthus politus (Linnaeus)
 Philonthus sanguinolentus (Gravenhorst)
 Philonthus splendens (Fabricius)
 Philonthus succicola Thomson
 Philonthus tenuicornis (Mulsant and Rey)
 Philonthus varians (Paykull)
 Platydracus latebricola (Gravenhorst)
 Platydracus stercorarius (Olivier)
 Quedius cinctus (Paykull)
 Quedius cruentus (Olivier)
 Quedius lateralis (Gravenhorst)
 Quedius maurorufus (Gravenhorst)
 Quedius picipes (Mannerheim)
 Staphylinus dimidiaticornis Gemminger
 Tasgius ater (Gravenhorst)
 Xantholinus gallicus Coiffait
 Xantholinus linearis (Olivier)
 Xantholinus longiventris Heer
Tenebrionidae
Tetratomidae
Throscidae
Trogidae