Cryptini.] BRITISH ICHNEUMONS. 267 



Table of Genera. 



Radius of upper wing short and straight ; median of lower angulatcd 

 at nervellus. 



Post-petiole discally curved ; mesonotum 

 declived in front, notauli distinct. 



Discoidal cell obtuse below and not ex- 

 tending to below apex of areolet. 



Areolet large and usually parallel-sided. 



Areolet laterally slightly convergent ; anus 

 immaculate PVCNOCRYPTUS, Thorns. 



Areolet parallel-sided ; anus usually white. 



Petiolar tubercles far behind centre Spilocryptu.S, Thorns. 



Petiolar tubercles only just behind centre. 



Coxal area distinct ; onychii not stout ... HOPLOCRYPTU.S, Thorns. 



Coxal area wanting ; onychii stout and 

 often large. 



Onychii shorter than second tarsal joint G.AMRRUS, Forst. 



Onychii longer than second tarsal joint ... AkitR-MNLS, Forst. 



Areolet somewhat small and distinctly 

 convergent Hap.rocryptu.s, Thorns. 



Discoidal cell rectangular below and ex- 

 tending to below apex of areolet C.\ENOCRYPTUS, Thoms. 



Post-petiole discally straight ; mesonotum 

 not declived ; notauli obsolete. 



Lower basal nervure pellucid ; epomiae 

 obsolete Idiolisp.a, Forst. 



Lower basal nervure entire ; epomiae 

 short but distinct GONIOCRYPTUS, Thoms. 



Radius of upper wing long and curved ; 

 median of lower wing straight. 



Second joint of palpi triangular ; abdomen 

 cyaneous Megaplectes, Forst. 



Second joint of palpi cylindrical ; abdo- 

 men not cyaneous. 



Basal flagellar joints apically incrassate ; 

 post-petiole explanate. 



Head transverse, clypcus mutic ; petiolar 

 spiracles not central Cryptus, /^a<^. 



Head cubical, clypeus mucronate ; petiolar 

 spiracles central. 



Mesosternal sulcus reaching base ; meta- 

 notum with apical costa Nyxeopmilus, Forst. 



Mesosternal sulcus not reaching base ; 

 metanotum with basal costa Xylophurus, Forst. 



Flagellar joints cylindrical ; post-petiole 

 linear AcRORICNUS, Ratz. 



PYCNOCRYTPUS, Thomson. 



Thoms. O. E. v. 500. 



Head sub-triangular, vertex declived behind the ocelli ; epistoma and 

 clypeus sub-conve.x, the latter apically mutic ; cheeks elongate and not 

 buccate. Antennae of $ filiform, spiral, white-banded, with post-annellus 

 a little longer than the scape. Metathoracic spiracles sub-rotund. Abdo- 

 men elongate, terebra far-exserted and sub-dellexed ; first segment a little 

 dilated and elevated, with post-petiole hardly margined, the second shining 

 and not alutaceous, sparsely punctate ; anus not marked with white. 



