^fesochl»■lls] BRITISH ICHNEUMONS. 315 



(29). 2%. Head narrowed to mouth ; hind tibiae 



not basally black 13. THOKACICUS, Grav. 



(28). 29. Head not apically constricted ; hind 



tibiae basally'black ..14. SVLVARUM, C/irf. 



{2;^). 30. Face of ^ 9 pale; abdomen of 9 at 

 least apically pale. 



(38). 31. iMesonotum neither whitish nor oliv- 

 a c e o u s - m a r k e d . 



(37). 1^2. Stig'ma not paU\ nor petiole basally 

 ^ testaceous. 



(34). T,^. Cheeks elontjate and buccate ; body 



not strono^ly eloni^ate . . i5- IM.MIDI.M is, Holin^r. 



(.5j)- 34- Cheeks short and not buccate ; body 

 strong'ly elonsfate. 



(36). 35. Black with anus flavous ; unguiculi 



explanate ..16. ck.\s>i.\i.\xu.s, i^y////^'r. 



(35). 36. Red with black markings; unguiculi 



not explanate .. i/- \li i A lOK, //^V///^';-. 



{}^2). 37. Stigma pale ; petiole basally testace- 

 ous . . . . . . . . 18. TENUiscArr.s, Tlioiiis. 



(31). }fi. Mesonotum whitish, with three oliv- 

 aceous marks ..19. I'AI.I.IDIS, /j'/v'sr//. 



{22'). 39. Hind tarsi nigrescent or obscurely in- 

 fuscate; thorax black. 



(43). 40. Flagellum black ; orbits rufescent 

 throughout. 



(42). 41. Petiole slender, half breadth of post- 

 petiole; areolet sessile .. ..20. pectoralis, A'^/s. 



(41). 42. Petiole broad, little less than post- 

 petiole; areolet petiolate- .. 21. r.REViPETIOLATU.'^, i'?^//:. 



(40). 43. Flagellum basally pale; at least 



frontal orbits whitish . . 22. TACHVPU.s, Hi)lingr. 



(13) 44. Size small ; terebra nearly subulate ; 

 petiolar spiracles often beyond 

 centre ; basal nervure rarely con- 

 tinuous ; areolet sessile. 



(46). 45. Lower basal nervure antefurcal ; face 



and cheeks not striate .. .. 2^-^. Ascni.w.vs, //o/wj^r. 



(45). 4C. Lower basal not antefurcal ; face or 

 cheeks usually striolate. 



(S"^)- -17- Recurrent nervure emitted before 

 centre of the sessile areolet. 



(49). 48. Cheeks elongate second segment at 



most apically pale .. ..24. l'lcil\A<, //o////i;r. 



(48). 49. Cheeks normal ; second segment 



discally pale .. .. .. 25. EASCIAMS, /)'/v<'/i,'-. 



(47). 50. Recurrent nervure emitted from cen- 

 tre of petiolate areolet .. 26. ANClf.STATLs, '/'//('///S. 



1. politus, Grav. 



Mcsoclionis politiis, (Jr. IE. ii.974; Ratz. Ichn. d. Forst. ill. 119; Ilolmgr. Sv. 

 Ak. Handl. 1858. p. 122; Thorns. Ann. Soc. Fr. 1885, p.SXi, ,r ? ; Brisch. Sclir. 

 Nat. Ges. Danz. 1880, p. 180, ? ; cf. lib. cit. 1888. p. SH. 



A stout, shining, black species with the legs inunaculate slraniincH)iis, 

 the petiole basally infiiscatc testaceous and scutellutn apicallx tul)erculate. 

 Head transverse and but little constricted posteriorly, mouth pale; orbits 

 red, the internal and in ^ whole face entirely white; lace quadrate, 



