SOLITARY BEES AND WASPS OF ESSEX. 81 Scapania curta (Mart.) Dum. 18 C; Epping Forest, E.F.C.; Fairly frequent in the Forest. No record for 19. Radula complanata (L.) Dum. 18 C; Epping Forest, E.F.C.; 19, "Kelvedon," E.G.V. ;. Saffron Walden, 1926. Madotheca platyphylla (L.) Dum. 18 C ; 19, "Kelvedon, Colchester," E.G.V. ; Great Canford, Miss E. Armitage, 1923 ; Saffron Walden, 1926. Frullania Tamarisci (L.) Dum. 18, "On trees near Fairmead bottom," E.F. No recent record for the county. Frullania dilatata (L.) Dum. 18 C ; 19, "Kelvedon, 1860," E.G.V. ; Lower Forest, J. Ross, 1926 ; Saffron Walden, 1926. Anthoceros punctatus L. 18, "In the common field near Walthamstow Church towards the southern hedge," E.F. ; "In Mark House Field," E.F. No recent record for the county. NOTES ON THE SOLITARY BEES AND WASPS OF ESSEX. By CHARLES NICHOLSON, F.E.S. [Read 30th October, 1926 ; with later additions.] WE are concerned here with the "solitary" species only of the Aculeate section of the great Order of insects known as Hymenoptera ; the following table will make clear the modern grouping of the Order :—