250 Rev. F. W. Hope's Observations XXXIX. Observations on the Fossil Insects of Aix in Provence, with Descriptions and Figures of Three Species. By the Rev. F. W. Hope, F.R.S., P.E.S. [Read 5th August, 1844.] In my late visit to the Continent, besides amassing a rich collection of recent insects, my attention was also directed to those which for some period or periods have been entombed in a fossil state. The major part were obtained at Aix in Provence, and at Sinigaglia in Italy. It is not my intention at present to describe any of the latter formation, and I only at present figure three from the former loca-lity, being doubtful if they will interest the Entomological Society equally as much as existing and recent species. Little I believe has been written on the fossil insects of Aix, excepting a memoir by Marcel de Serres* and Mr. Murchison, and some notices by Mr. J. Curtis, published in 1831 or 18.32. Hein-rich Georg Bronn, in his " Lethsea Geognostica,"]-(published in 1838,) gives in his second volume a catalogue of the genera which have been discovered at Aix ; and as it is a work little known to many of us, I insert the list of names there published, adding the letter B to designate those with which he was acquainted, and the letter H to particularize those which have fallen under ray inspec-tion. COLEOPTERA. * Marcel de Serres mentions 62 genera of Insects ; vide " G6olog. desTertiares du Midi de la France." t " Lethsea Geognostica, von Heinrich Georg Bronn," in 2 vols. 8vo. published in 1838. t jB. alludes to the species mentioned in Bronn's Catalogue, and H. those which have fallen under the inspection of Mr. Hope.