2 BRITISH ICHNEUMONS. {Phygadeuonides. 



sub-divided longitudinally by two costae, by the stigma of the wings being 

 usually broader, the basal ncrvure more or less curved, and the costal 

 abscissa smaller. From the Sii/pnides, to which some Hemifeles and 

 most male Pezomachus closely approximate, the distinct convexity of the 

 metathorax at the point where it is normally bisected by the transverse 

 costa will at once separate it, for in the former the metanotum is gradually 

 declived throughout from base to the often produced apex. 



Sub-tribe 

 PHYGADEUONINI. 



Table of Genera. 



(30). I. Basal abdominal segment not broader at base than apex. 

 (3). 2. Metathorax with but one transverse 



costa Helcostizus, Forst. 



(2). 3. Metathoracic transverse and longitu- 

 dinal costae entire. 



(23). 4. Mesonotum not centrally sulcate. 



(24). 5. Petiolar area not reaching base of 

 metathorax. 



(25). 6. Lower outer angle of discoidal cell not 

 acute ; $ face pale. 



(12). 7. Metathoracic spiracles oblong or oval. 



(11). 8. Antennal scrobes obsolete ; tibiae finely 

 spinulose. 



(10). 9. Frons very finely punctate GiRAUDiA, Forst. 



(9). 10. Frons strongly punctate COELOCRYPTU.S, TV^wwj. 



(8.) II. Antennal scrobes distinct; tibiae 



strongly spinulose Plectocryptus, Thovis. 



(7). 12. Metathoracic spiracles small and cir- 

 cular. 



(20). 13. Clypeus not apically bidentate ; ab- 

 domen mainly black. 



(15). 14. Head transverse; abdomen strongly 



pilose .. Trichocryptus, Thorns. 



(14). 15. Head not transverse ; abdomen nor- 

 mally pubescent. 



(19). 16. Mandibular teeth unequal in length ; 

 head normal. 



(18). 17. Metathorax smooth or punctate Cratocryptus, T/io»is. 



(17). 18. Metathorax rugose Demopheles, /"i^rji-/. 



(16). 19. Mandibular teeth of equal length ; 



head sub-cubical CUBOCEPHALUS, Rafz. 



(13). 20. Clypeus apically bidentate or abdomen 

 centrally red. 



(22). 21. Basal thoracic area not transverse nor 



apically convergent Microcryptus, Thorns. 



(21). 22. Basal thoracic area transverse and 



strongly convergent apically Acanthocryptus, Thorns. 



(4). 23. Mesonotum deeply longitudinally sul- 

 cate centrally Obisiphaga, Mori. 



(5). 24. Petiolar area reaching base of meta- 

 thorax Cremnode.s, Forst. 



(6). 25. Lower outer angle of discoidal cell 

 acute ; $ head black. 



(27). 26. Scutellar fovea transcarinate centrally ; 



tibiae spinose Glyphicnemis, Forst. 



