Stilbops.] 



BRITISH ICHNEUMONS. 



171 



Tribe 



LISSONOTIDES. 



No hesitation can be experienced respecting the representatives of this 

 Tribe, for they are all easily distinguished by negative characters : the 

 head is transverse and not cubical, as in the Xo) ididts ; the abdomen is 

 evenly sculptured throughout and not impressed nor tuberculate, as in the 

 Piinplidcs ; the hypopygium does not reach the anus nor cover the base 

 of the terebra, although in Procinctus and Lainpronota it has distinct indi- 

 cations of such a modification and they are certainly closely related to 

 Acaenifides ; and the areolet is triangular or oblique and small or wanting, 

 never rhomboidal, as in the Banchides. 



Many of the species of this group are among our commonest British 

 insects and most beneficial parasites ; the nomenclature has undergone 

 considerable alterations and emendations since the publication of the last 

 British list ; but it is still almost certain that but a fraction of the indi- 

 genous genera and species is at present known. 



TahU' of Genera. 



Metathoracic spiracles circular, small 

 and, if somewhat oval, oblique. 



Tarsal claws not pectinate, at most 

 setiferous. 



Body elongately pilose or metanotal 

 areae complete. 



Finely pubescent ; face apically acu- 

 minate ; stigma broad 



Elongately pilose ; face and stigma 

 norma! 



Body not elongately pilose nor meta- 

 thoracic areae complete. 



Apical flagellar joints moniliform and 

 discreted ; terebra short 



All flagellar joints cylindrical and not 

 discreted ; terebra elongate 



Tarsal claws distinctly and usually 

 closely pectinate. 



Abdomen subsessile and usually dull ; 

 areolet triangular 



Abdomen subpetiolate, strongly shin- 

 ing; areolet oblique 



Metathoracic spiracles elongate, large 

 or transverse. 



Notauli obsolete ; areola wanting ; 

 areolet entire. 



Nerveilus intercepting below centre ; 

 nervelet obsolete 



Nerveilus intercepting far above cen- 

 tre ; nervelet elongate 



Notauli very deep ; areola laterally 

 entire ; areolet wanting 



Stiluops, Fijrst. 



A R E N E 1 R.\ , Holnigr . 



Crvptopi.mpla, Tasch. 

 Li.sso\OT.\, Grav. 



Meniscus, Schibd. 

 PHVToniAETrs, Grav. 



Sv/EUCTLs, Fiirst. 

 Procinetus. Fiirst. 

 Lampronota, Hal. 



