244 



BRITISH ICHNEUMONS. 



All the coxae black. 



Head as broad as thorax ; checks 



apically dilated 8. SEMIVULPINUS, Craz/, 



Head broader than thorax ; cheeks 



apically not dilated 9. pla-nifross, JVesm. 



All the coxae mainly red 10. mki.anogonus, G/ne/. 



Post-petiole distinctly aciculate 11. HETER0G0NUS,//i3////g'r. 



Face not strongly, more or less closely 



and distinctly punctate. 

 Cheeks apically sinuate and produced 



beneath mandibles 12. OPHTHALMICUS, JVcsm. 



Cheeks not sinuate and not or hardly 



produced. 

 Frons closely, sometimes sub-obso- 



letely, punctate. 

 Frons deeply punctate ; clypeus neither 



margined nor sinuate ; tegulae ni- 

 grescent. 

 Clypeus laterally entire. 

 Notauli elongate ; segments two to 



four finely alutaceous 13. UO'DESTUS, IVcsm. 



Notauli obsolete or punctiform ; seg- 

 ments two to four punctate. 

 Post-petiole not aciculate ; coxae black. 



Cheeks sub-buccate ; vertex normal ... 14. FUSCICORNIS, Westn. 

 Cheeks not buccate ; vertex rounded 15. TREPlDUS, IVcsin. 

 Post-petiole usually aciculate ; front 



coxae piceous or red 16. INFIMUS, IVesm. 



Clypeus laterally sub-sinuate 17. eques, IVcsm. 



Frons superficially and finely punctate. 

 Clypeus laterally sub-sinuate, apically 



immarginate ; tegulae pale. 

 Flagellum of 9 tricoloured, its coxae 



mucronate 18. ischiomelinus, Cra?/. 



Flagellum bicoloured, coxae mutic ... 19. impiger, IVesm. 

 Clypeus laterally entire. 

 Clypeus apically margined by an im- 

 pressed line. 

 Frons of c^ not smooth ; flagellum of 



9 tricoloured 20. bellicornis, ff'^JW. 



Frons of $ sub-glabrous ; flagellum of 



5 bicoloured 21. NANUS, IVesin. 



Clypeus apically immarginate. 



Coxal tooth of 9 vertical ; face of $ 



white 22. MACULICORNIS, Sfi'ph. 



Coxal tooth of 5 not vertical ; face of 



(J mainly black. 

 Antennae mainly black ; length, 5 mm. 23. MYSTICUS, JFesm. 

 Antennae mainly red ; length, 8 mm. 



Flagellum not entirely red 24. STIMULATOR, 6^ra7/. 



Flagellum entirely red 25. HOMOCHLORUS, IVesm. 



Frons sparsely punctate, especially in 



the centre. 

 Abdomen in both sexes black ; hind 



tibiae and tarsi white-banded 26. CALLOPUS, JVcsm. 



Abdomen of ? centrally red ; hind 



legs not or indistinctly white-marked. 

 Pronotum and humeral callosities white 27. FULVITARSIS, IVesni. 

 Pronotum and humeral callosities black. 



