Ophion undulatus Gravenhorst, 1829: 697 Ophion arcuatus Brullé, 1846: 146 The British species of Enicospilus (Hymenoptera: Ichneumonidae: Ophioninae) Broad, Gavin R. Shaw, Mark R. European Journal of Taxonomy 2016 2016-04-04 187 1 31 6FC72 (Gravenhorst, 1829) Gravenhorst 1829 [535,1052,1140,1167] Insecta Ichneumonidae Enicospilus Animalia Hymenoptera 24 25 Arthropoda species undulatus   Figs 2A, 3B, 20B      Ophion undulatus Gravenhorst, 1829: 697.     Ophion arcuatus Brullé, 1846: 146.   Status  A very rarely collected species, found on southern coastal heaths where it has been reared from  Lasiocampa trifolii(Denis & Schiffermüller, 1775) (Lasiocampidae). The host is now very local and  E. undulatushas not been found in Britain since 1971.    Material examined  ENGLAND: 1 ♀, 1 Ƌ, Dungeness ( VC15), ex  Lasiocampa trifoliicoll. as larva 6 Jun. 1945(G. V. Bull) ( BMNH); 1 ♀, 1 Ƌ, Ilfracombe ( VC4), Jul. 1971(I.D. Gauld); 1 ♀, Lowestoft ( VC25), Jul. 1971(I.D. Gauld) (latter two records taken from Gauld, 1974; specimens not in BMNH).  Additional material in NMS  SPAIN: 1 ♀, Zaragoza, Montes de Torrero, 230 m, 24 May 1998(G.E. King).    Remarks   Enicospilus inflexushas been separated from  E. undulatuson the basis of differences in head shape ( Gauld 1974) which seem to be consistent, based on the limited material in BMNH. Although there may be a difference in host use, this is based on only two rearings of  E. undulatus, from one place and date; although  Lasiocampa trifoliiis rather smaller than  L. quercus,  E. inflexusand  E. undulatusdo not differ significantly in size.