Description of a new species of longicorn beetle from the East Indies / G.R. Waterhouse. Description of a new curculionideous beetle from the Swan River / F.W. Hope. Observations on the osculant crustaceous genus Arcturus of Latreille; with the description of a British species / J.O. Westwood. On the apparent identity of Sphinx ephemeraeformis of Haworth, with Psyche plumifera of Ochsenheimer / J.F. Stephens. Notice of the habits of Odynerus antilope / J.O. Westwood. Observations on certain species of the genus Dromius / C.C. Babington. Introductory observations upon the Thysanura / J.O. Westwood. Description d'un nouveau genre de curculionites / M.A. Chevrolat. Descriptions of new species of Indian ants / W.H. Sykes. Monograph on Mimela, a genus of coleopterous insects / F.W. Hope. Note upon the British genera Acentria, Acentropus, and Zancle / J.O. Westwood. Observations on the ravages of Limnoria terebrans, with suggestions for a preventative against the same / F.W. Hope. Description of a new species of Australian moth / G.R. Gray. Observations on insects producing silk, and on the possibility of rearing silk crops in England / F.W. Hope. Remarks on some mechanical peculiarities noticed in a spider's web observed at Wandsworth, Surrey / W.W. Saunders. Observations upon habits of Copris midas / W.H. Sykes.