PARASITICA — ICHNEUMONIDiE, 47 



Subfamily Tryphonin^. 

 Table of Genera. 



Scutelhim more or less elevated, narrowed posteriorly, ai)ex rounded 2. 



Scutellum quadrangular, with prominent posterior angles and carinate lateral 

 margins; face scutatiform, subconcave, with elevated margins; areolet 

 large, rhomboidal ; posterior femora robust, their tibiie with a single 

 spur at tip; abdomen sessile, almost uniform in width and generally 



roughly sculptured 9Ieto|>iii!s$ Grav. 



2. — Upper tooth of the mandibles entire 3. 



Upper tooth of the mandibles bifid, the apical margin therefore tridentate ; 

 abdomen sessile, first segment quadrate or subquadrate ; areolet wanting 

 or triangular, the first recurrent nervure usually angularly bent. 



Bassuiit (irav. 



3. — Clypeus separated or nearly so ; face but slightly prominent ; first joint of 



flagellum longer than the second; spiracles of metathorax circular; 



femora, especially the anterior pair, slender 4. 



Clypeus not distinctly separated ; face almost always considerably swollen ; 

 joints 1 and 2 of the flagellum subequal in length; spiracles of meta- 

 thorax oval, rarely round; femora, especially the posterior pair, much 



swollen 18. 



4. — Posterior and intermediate tibi;e with two apical spurs 5. 



Posterior tibiae without apical spurs, rarely with one very short i)ne ; inter- 

 mediate tibiae with one apical spur 17. 



'■>. — Abdomen petiolate 6. 



Abdomen sessile or subsessile, first segment more or less grooved or cari- 

 nate 12. 



(5. — Clypeus generally transverse, not or scarcely protruberant. scape of antenna; 



oval or elongate 7. 



Clypeus narrow, protuberant; scape large, almost spherical: form very 



slender Megast.ylus Schiodte. 



7. — Tarsal claws not pectinate 8. 



Tarsal claws pectinate 11. 



8. — Head transverse, not elevated above, the cheeks not or but slightly swollen, 



vertex eraarginate i). 



Head more or less elevated or swollen, with feebly emarginate vertex, cheeks 



swollen, first abdominal segment smooth 10. 



9. — First abdominal segment straight, linear, or gradually expanded posteriorly. 



iMeiiioIcptiiM Grav. 

 First abdominal segment bent, its posterior portion gradually expanded. 

 Teeth of mandibles une(iual, the lower longest ; clypeus with two lateral 

 depressions; areolet usually wanting; ovipositor bent downwards. 



' C"« t <>$; 1 y |> t II !>> Foi-st. 

 Teeth of the mandibles equal or nearly so. 



Ovipositor straight ; areolet usually present ; the middle tibia' somewhat 



bent ••■Eiir.Vproi'liiM llolmgr. 



Ovipositor bent upwards, the last segment therefore subeniarginate 

 above; areolet triangular or wanting; femora, especially the posterior 

 pair robust, as well as the filiform antennse... ■Xolop.ygii!!* llolmgr. 



