302 AMERICAN HYMENOPTERA. 



26. Clypeiis impressed before apex, finely ruargined : mesonotnin and scutellum 



sliagreeued and punctured Alexeter Foerst. 



Clypeus without apical impression 27. 



27. Clypeus flat; second lateral area projecting tooth-like; radius starting back 



of the middle of stigma »Oxy torus Foei-st. 



Clypeus not flat ; second lateral area without tooth-like projection ••• 28. 



28. Eadius starting from middle of the stigma; humeral cross-nervure broken 



above the middle; mesonotum sbagreeued and punctured. 



Syinphobiis Foerst. 

 Eadius starting before middle of the stigma 29. 



29. Humeral cross-nervure broken below the middle; mesonotum and scutellum 



smooth, punctured ; antennse without pale annulus. 



Zeiiiio«les Foerst. 



Humeral cross-nervure broken somewhat above the middle; mesonotum 



shagreened and punctured 30. 



30. Second recurrent nervure broken and with a branch which extends outward ; 



base of third discoidal cell broader than transverse median nervure; 

 individual teeth slightly notched at apex ; antenuse and hind tarsi not 



annulate with white «Tei'OZOa Foerst. 



Second recurrent nervure not broken and without spur; base of third dis- 

 coidal cell not as broad as the transverse median nervure; teeth of 

 mandibles not divided ; antennae and tarsi with white annuli. 



''-Hiinerla Foerst. 



31. Clypeus with a transverse impression at the apex 32. 



Clypeus without a transverse impression at the apex 33. 



32. Third member of maxillary palpi with a small tooth at its apex. 



*Genarches Foerst. 

 Third member of maxillary palpi without tooth at the apex. 



-'''Diedriis Foerst. 



33. Wings without an areolet t»5Jeleolhyinus Foerst. 



Wings with an areolet 34. 



34. Spiracles of metathorax round, or very slightly oval; petiole of abdomen 



more or less arched ; body shagreened 35. 



Spiracles of metathorax plainly elongate ; petiole of abdomen large, straight ; 

 transverse median nervure uniting considerably back of the basal; 

 pleurte and hind coxse distinctly punctured but not shagreened. 



Assyniictus Foerst. 



35. Transverse median nervure uniting back ot basal ; humeral cross-nervure 



broken below the middle Clepsiporthuw Foerst. 



Transverse median nervure most usually starts in front of basal, seldom 

 interstitial, very seldom distinctly behind it ; humeral cross-nervure 

 is almost always broken above the middle- .Euryproctus Holmgr. 



SPAXOTE€NrS Foerst. 

 (Synopsis der Fam. und Gatt. der Ichneumonen, 1868.) 



Head moderately enlarged, oval in front, considerably excavated 

 behind ; eyes small ; autennse long, slender ; clypeus transverse, 

 moderately prominent ; lower tooth of mandibles larger and longer 

 than the upper one. Mesothorax broad, without parapsidal grooves ; 



