48 BRITISH ICHNEUMONS. {I'hersilochus 



radial branch at least in J extending to apex of wing ; recurrent nervure 

 emitted beyond areolar; nervellus somewhat oblique. Length, 3.5-4 mm. 



Schmiedeknecht here synonymises T. frontcUus, Holmgr. cl Brisch., 

 but I consider it extremely doubtful if the former author described the 

 present species and Brischke is not likely to have done so on the same 

 page as T. tn'atigu/aris, his account of which itself agrees none to closely 

 with the original description. 



(jcrmany, Sweden and bred in France from Cfii/hoirhviuhus Robcrli 

 (Gaulle). Bridgman found it at Hethersett and Norwich during IVlay 

 and June ; Bignell at Bovisand in Devon on 25th June. 



8. rufiventris, Brisch. 



Thcrsilochtis rufiventris, Brisch. Schr. Nat. Ges. Danz. 18S0, p. 196, ? . T. 

 flavicornis, Thorns. O.E. xiii. 1391, ? . 



Head almost broader than thorax, dull and posteriorly constricted, 

 with the palpi, mandibles and clypeal apex rufescent. Antennae rules- 

 cent and extending to thoracic apex, slender with the first flagellar joint 

 longer than the second. Thorax dull with basal metathoracic area dis- 

 tinct. Abdomen testaceous with only the first segment basally black ; 

 basal segment curved, longer than hind coxae and trochanters ; the second 

 and third discally broad, with former transverse and the following later- 

 ally compressed ; terebra as long as abdomen. Legs entirely testaceous. 

 Wings with radix and tegulae flavous ; apical abscissa of radial nervure 

 straight, recurrent emitted beyond the areolar, and nervellus distinctly 

 oblique. Length, 3 mm. ^ unknown. 



SA\eden, Prussia and repeatedly taken by Schm. in Thuringia. T. flavi- 

 cornis is introduced by Bridgman (Trans. Ent. Soc. 1889, p. 431) on the 

 strength of a male he bred from the galls of A'aiiaitis gallicola at Eaton 

 near Norwich and another captured in the same locality. 



9. truncorum, Holmgr. 



Porizon jocator, var. 2, Gr. I.E. iii. 771, d" . Thersilochus trtincoruni , Holmgr. 

 Sv. Ak. Handl. 1858, p. 136; Thorns. O.E. xiii. 1393, cT ? . T. (Gonolochus) trun- 

 corum, Brisch. Schr. Nat. Ges. Danz. 1880, p. 193, ? . 



Head almost broader than thorax, dull and posteriorly constricted ; 

 cheeks short; clypeus distinctly discreted, smooth, shining and apically, 

 together with palpi and mandibles, rufescent. Antennae slender and 

 basally testaceous, with third flagellar joint a little longer than broad. 

 Thorax strongly convex with mesopleurae shining and but very finely 

 rugul(;se; sternauli distinct and entire; metathorax scarcely rugose, with 

 basal area usually incomplete, but petiolar always distinct. Abdomen with 

 second segment entirely and remainder laterally red ; of $ strongly and 

 of V slightly compressed; second segment of 9 transverse and ot ^ a 

 little longer than broad; terebra as long as basal segment. Legs entirely 

 testaceous. Wings hyaline with the stigma piceous and tegulae flavidous ; 

 radial branch extending to apex of wing. Length, 3-3.5 mm. 



This species closely resembles T.jocalor, but it is at once known by 

 the entirely pale legs, more slender antennae, apically indicated notauli, 



