BRITISH ICHNEUMONS. 



41 



Face not distinctly convex ; body 

 normal ; areola basally rect- 

 angular. 



Abdomen and stigma usually pale ; 

 areola often elongate, always 

 rectangular, its costae weak 6. ICHNEUMON, Liitn. 



Abdomen and stigma usually black ; 

 areola hexagonal or sub-quad- 

 rate, its costae strong 4. Melanichneumon, jy^t^wj-. 



Gastrocaeli sub-obsolete ; terebra 

 and eighth dorsal segment dis- 

 tinctly exserted 7. EXEPHANES, Wesm. 



Basal segment dorsally intumescent 



in the centre 8. Proboloides, Mori. 



Clypeus apically emarginate ; body 



sub-cylindrical g. Chasmias, y^j'//;«. 



Proboloides. 



Eupalamus. 



Chasmias. 



Proboloides. tLupaiamus. unasmias. Exephanes. 



Intumescent post-petiole 2nd segment margined. Emarginate clypeus. 8th segment exserted. 



Stenichiu 

 Quadrate 



:umon. 

 areola. 



Barichnetimon. 



Areola 



transverse. 



Mdauichneumon. 



Hexagonal 



areola. 



Setaceous antenna. 



"^j ' I ffliitin n M nj.MinnjTTvrT 



Filiform antenna. 



STEN ICHNEUMON, Thomson. 



Thorns. O. E. xviii. 1893, 1964- 



Head triangular, face distinctly arched, narrowed behind the eyes and 

 towards the mouth ; cheeks not short ; mandibles not stout, narrowed 

 apically ; antennae of female slender, flagellar joints not short beneath. 

 Thorax with the mesonotum often dull, very closely punctate ; mctathoracic 

 areola not triangular, petiolar area rarely impressed, dentiparal areae not 

 spined. Abdomen with central area of post-petiole striolate or very finely 

 scabrous ; second segment with the thyridii not deep but strongly trans- 

 verse, or more rarely oblique, nearly extending to the lateral margin ; 

 third with a distinct basal depression. Legs somewhat slender. Head 

 sometimes with white vertical dots or lunulae ; the abdomen apically 

 immaculate, rarely dingy flavous- or white-marked. 



