( 452 ) XIX. On the Hymenopterous Parasites of Coleoptera. First Supplement. By Ernest A. Elliott, F.Z.S., and Claude Morley, F.Z.S. [Read March 1st, 1911.] Since the publication of our Paper upon this subject, in these Transactions in 1907, much additional matter has come to our knowledge, principally through the works of Nees von Esenbeck, Dours, Professor Thomson, Curtis, Rev. T. A. Marshall, Dalla Torre, Kieffer, and papers in the earlier E. M. M., and by Pierre in Revue Linn, of 1903. This material now appears to have assumed sufficient bulk for publication, and should be used in conjunction with the original Paper, with which it is uniform and concurrently numbered. Additional hosts are printed in capitals and those already known to be attacked, but upon which additional observations are noted, in italics as before. Oa. CICINDELA CAMPESTRIS, L. 0/3. CICINDELA SYLVATICA, L. It has recently become known that our rare Aculeate, Metlwca ichneumonoidcs, Latr., is a true external parasite on these species. First, Gottfiid Adlerz observed ( Archiv. for Zoologi, 1903, pp. 2.55-8) Metlwca attacking larva of C. sylvatica on the bank of the Ljungan in Medelpad, Central Sweden. Secondly, the same author {lib. cit., 1906, iv. pp. 1-48) describes in detail experiments with Methoea on C. campestris larvae in captivity. And lastly, B. E. Bouwman saw (Tijdsch. v. Ent., 1909, pp. 284-294) Methoea enter a burrow of Gicindela larva at Breda in June ; it paralysed its head, thorax and two basal segments, also biting the sternum ; the egg is laid on the ventral surface of thorax; the Methoea emerges in four or five days, and appears to suck juices from Cicindela larva without any distinct incision ; it leaves its host in about three weeks and forms a cocoon of sand-grains ; no male Methoea were seen. Donisthorpe tells us it probably also attacks Cieindela germanica, L., since he has found it at Blackgang Chine. TRANS. ENT. SOC. LOND. 1911. — PART II. (oCT.)
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