308 THE CANADIAN ENTOMOLOGIST. 



Thorax not or only a little longer than wide, quadrate or nearly, 

 obtrapezoidal, short ovoid or otherwise shaped. 



Thorax obtrapezoidal or short ovoid 22. 



Thorax hexagonal, a little wider than long, punctate ; head 

 subglobose ; first and second joints of the flagellum only a 

 little longer than thick. (Australia). .Eurymutilla, Ashmead. 



(Type Mutilla affinis, Westw.) 



22. Thorax at least i ^/^ times as long as wide 24. 



Thorax obtrapezoidal and only a little longer than wide. 



Mandibles excised beneath 23. 



Mandibles not excised beneath. 



Mandibles conically pointed edentate; first and second joints 

 of the flagellum small, not longer than wide, the third 

 joint longer than the second . . Micromuiilla, Ashmead. 

 Mandibles falcate^ but with a small tooth within before the 

 apex; first joint of the flagellum much longer than wide 

 and longer than the second .. Neophotopsis, Ashmead. 



23. Mandibles decussate, acute at apex, but with a minute tooth within 



before the apex ? Odontophotopsis, Viereck. 



24. Thorax banjo-shaped, or nearly 32. 



Thorax obovoid or obpyriform. 



Head transverse quadrate, the temples broad ; eyes oval or 

 ellipsoidal ; highly polished. 



Mandibles long, acuminate decussate, edentate, first 

 joint of the flagellum long, obconical, longer than 

 the 2nd and 3rd united. . . .? Neophotopsis, Ashm- 

 Thorax obtrapezoidal. 



Head subglobose, the temples rather broad ; eyes ellipsoidal 

 or nearly round. 



Scape very long ; first joint of flagellum very long ; 

 mandibles long, slender, pointed at apex, v/ith two 



teeth within Scaptodactyla, Burmeister. 



Scape normal ; first joint of flagellum not especially 

 long. 



Left mandible ivith an incision beneath 

 toward base. 



