V. Hymenoptera aculeata collected in Algeyia. The Sphegidae. (Being Part V of the work commenced by the late Edward Saunderfs.R,. S., in Trans. Ent. Soc. 1901, p. 515.)

( 02 ) V. Hymenoptera aculeata collected in Algeria. The Spbegidae. {Being Part V of the work commenced hy the late EDWARD Saunders, F.R.S., in Trans. Ent. Soc. 1901, 'p. 515.) Revised and comj)leted hy the Rev. F. D. Morice, M.A., F.E.S. [Read November 2nd, 1910.] In the first paper of the work above referred to {Hetero-gyna and Fossorcs to the end of Pomjnlidae) Mr. Saunders expressed his hope that I would follow it shortly with one upon the Sphegidae. But on attempting to do so, I soon discovered that I was undertaking a task to which I was unequal, and so we agreed instead that he should go on at once to the other parts of his subject (tbe Di'plop)tera and Anthophila) and publish his account of them without waiting for the completion of my paper. Later still, to my great relief, he consented to a further modification of the plan : that I should continue the work gradually till his other papers had appeared, after which he would co-operate with me in finishing it. So the matter stood when, in 1908, Saunders's third paper (the Anthophila) appeared in these Transactions ; and we then definitely settled arrangements for a division of labour, Saunders undertaking certain Genera, and I others, with the idea of speedily publishing a joint-paper which should form the concluding part of the entire series. Saunders's illness and death made it impossible to carry out the plan as it was intended ; but he was at work upon his share of it up to the last. He had practically com-pleted several " Descriptions of new species," which were found among his papers, and appeared in the Society's Transactions for 1910, Part IV. He had also drawn up an annotated list of all Mr. Eaton's insects (except a few which at the time were in my hands for determination) and had included in it certain of my own specimens, which he had examined and taken note of before leaving home. The annotations were mainly records of localities and dates of capture copied from the labels pinned under the specimens. Others were extracts from a MS. diary TRANS. ENT. SOC. LOND. 1911. — PART I. (MAY)