The Essex Naturalist 125 Lygaeidae Heterogaster urticae (Fab.) Lygus rugulipennis (Popp.) Nysius ericae (Schill.) Megalonotus emarginatus (Rey) [Hall Hill] Peritrechus lundi (Gmel) LOCAL Raglius alboacuminatus (Goeze) Nb Scolopostethus thompsoni Reut. Stygnocoris fuligineus (Geoff.) Nabidae Himacerus mirmicoides (Costa) Miridae Lygus maritimus (Wag.) Calocoris norvegicus (Gmel.) Cydnidae Sehirus bicolor (L.) Tingidae Derephysia foliacea (Fall.) HYMENOPTERA Braconidae Chelonus sp. Dryinidae Gonatopus clavipes Thunberg Bethylinidae Pseudisobrachium subcyaneum Haliday det: J.T, Burn. A species previously recorded from Kent, Surrey, LOW. and Dorset. Associated with the ants Myrmecina graminicola (Lat.) and Tetramorium caespitum L. Formicidae Formica cunicularia Latr. Lasius niger (L.) Black Ant L. fuliginosus (Lat.) L. mixtus (Nyl.) LOCAL L. umbratus (Nyl.) LOCAL Myrmica specioides Bond. RDB.3 M. schenki Emery Nb M. scalmnodis Nyl. M. rubra (L.) M. sabuleti Mein. LOCAL M. ruginodis Nyl. Stenamma debilis Forst. LOCAL S. westwoodi West, (s.s.) Pompilidae Episyron rufipes (L.) LOCAL Agenioideus cinctellus Spin. LOCAL Chrysididae Chrysis ignita L. C. impressa Sch. C. rutiliventris Abeille de Perrin Chrysogona gracillima Forst. First Essex record. RDB 2 Hedychrum niemelai Linsenmaier RDB 3 Omalus auratus (L.) Trichrysis cyanea (L.) Sapygidae Sapyga clavicornis (L.) Nb Mutillidae Smicromyrme rufipes (Fab). Nb Myrmosa atra Pam. Eumenidae Ancistrocerus gazella (Panz.) Microdynerus exilis (Herr-Sch). Nb Odynerus melanocephalus (Gmelin) Na Vespidae Paravespula germanica (Fab.) German Wasp P. vulgaris (L.) Common Wasp Sphecidae Ammophila sabulosa (L.) LOCAL Cerceris quinquefasciata (Rossi) RDB 3 C. arenaria (L.) C. rybyensis (L.) LOCAL Crabro cribrarius (L.) LOCAL Crossocerus quadrimaculatus (Fab.) C. annulipes (Lepeletier & Brulle) C. megacephalus (Rossi) Diodontus luperus Schuckard LOCAL D. minutus (Fab.) D. tristis (Vander Linden) LOCAL Ectemnius continuus (Fab.) E. dives (Lepeletier & Brulle) LOCAL Mellinus arvensis (L.) Oxybelus uniglumis (L.) Philanthus triangulum Fab. RDB 2 Tachysphex pompiliformis (Panz.) Trypoxylon figulus (L.) T. medium de Beaumont T. clavicerum Lepeletier Colletidae Colletes daviesanus Smith C. fodiens (Geoffroy in Fourcroy) C. similis Sch. LOCAL Hylaeus hyalinatus Smith H. signatus (Panz.) Nb H. communis Nyl, Andrenidae Andrena bicolor Fab. A. dorsata (Kby.) LOCAL A. fulvago (Christ) Na A. flavipes Panz. LOCAL A. florea Fab. First Essex record. RDB 3 A. haemorrhoa (Fab.) A. humilis Imhoff Nb A. labiata Fab. Na A. minutula (Kby.) A. nigroaenea (Kby.) A. pubescens Ol. [Hall Hill] A. spectabilis Smith (= pilipes Fab.) Nb A. Saundersella Perkins A. scotica Perkins A. synadelpha