Some time since Mr. John T. Stobbs, F.G.S., obtained a very well-preserved impression in clay ironstone of the wing of a Neuropterous insect from the rich plant-bed at Foley, near Longton, North Staffordshire, which he very obligingly submitted to me for study. The geological horizon is that of the “Peacock Marl” (i.e., the marl overlying the Peacock Coal), and it therefore comes from near the top of the workable Coal-measures.