PARASITICA — ICHNEUMONID^E. 47 



►Subfamily Tryphonin^.. 

 Table of Genera. 



Scutellum more or less elevated, narrowed posteriorly, apex rounded '2. 



Sciitelliini quadrangular, with prominent jwsterior angles and carinate later.il 

 margins; face scutatiform, subcont-ave, with elevated margins; areolet 

 large, rhoniboidal ; posterior femora robust, their tibia; with a single 

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



roughly sculptured MetopiiiH Grav. 



•J.— Upper tooth of the mandibles entire ;{. 



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

 abdomen sessile, first segment quadrate or subquadrate; areolet wanting 

 or triangular, the fii-st recurrent nervure usually angularly bent. 



BaNNii»i Grav. 



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



fiagellum longer than the second; spiracles of metathorax circular; 



femora, especially the anterior pair, slender 4. 



Clypeus not distinctly separated ; face alnu>st always considerably swollen ; 

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

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



swollen IH. 



4. — Posterior and intermediate tibire with two apical spurs 'y. 



Posterior tibia; without apical spurs, rarely with one very short one ; inter- 

 mediate tibia' with one apical spur 17. 



•"). — Abdomen petiolate (>. 



Abdomen ses.sile or subsessile, first segnient more or less grooved or cari- 

 nate 12. 



<).— Clypeus generally transverse, not or scarcely protruberant, scape of antennai 



oval or elongate 7. 



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



slender Megastylus Schiiidte. 



7. — Tarsiil claws not i>ectinate 8. 



Tai-sal claws i)ectinate 11. 



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



vertex emarginate 9. 



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



swollen, first abdominal segment smooth 10. 



ii. — First abdominal segment .straight, linear, or gradually expanded jwsteriorly. 



.^Ic>NOl('ptu«i Grav. 

 First abdominal segment bent, its posterior portion gradually expanded. 

 Teeth of mandibles unequal, the lower longest ; clj'peus with two lateral 

 depressions ; areolet usually wanting ; ovipositor bent downwards. 



'Catoglypf us Forst. 

 Teeth of the mandibles equal or nearly so. 



Ovipositor straight ; areolet usually present; the middle tibirei .somewhat 



bent .. *Euryprocfus Holmgr. 



Ovipositor bent upwards, the last segment therefore subemarginate 

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

 pair robust, as well as the filiform anteunje... ■ Xof opygus Holmgr. 



