326 tHE CANADIAN ENTOMOLOGIST. 



Front wings wiih only two cubital cells, the third entirely 

 obliterated 24. 



15. Scutellum abnormal, conically or triangularly elevated, especially 



medially at apex ...16. 



Scutellum normal, not conically or triangularly elevated 17, 



16. Mesonotum with distinct furrows ; mandibles excised beneath, 



bidentate at apex : abdomen with the first ventral segment carinate 

 medially, the hypopygium margined laterally, emarginate at apex. 



(Africa.) Trogaspidia, Ashmead. 



(Type Mutilla medon. Smith.) 



17. Mesonotum with distinct parapsidal furrows, or the furrows indicated 



posteriorly 18. 



Mesonotum without parapsidal farrows 23. 



18. Mandibles beneath, before the middle, excised or sinuaied, and 



usually with a process or tooth before the incision 19. 



Mandibles beneath simple, not excised or sinuated, and never with a 

 process or tooth beneath 21. 



1 9. Mandibles bidentate 20. 



Mandibles tridentate. 



Submedian cell longer than the median, the second cubital cell 

 more or less triangular, the third large, hexagonal ; first joint of 

 the flagellum shorter than the second. (Europe, Africa, 



Asia.) Mutilla, Linne'. 



(Type M. europaea, Linne'.) 



20. Submedian cell longer than the median, rarely equal, the marginal cell 



about twice as long as wide ; first joint of the flagellum about as 

 long as the second ; hind tibise spinous and also with long hairs. 



(North and South America.) , TimuUa, Ashmead. 



(Type Mutilla dubitata. Smith.) 

 Submedian and median cells equal, the marginal cell not .much longer 

 than wide ; first joint of the flagellum distinctly shorter than the 

 second ; hind tibiae not spinous, but with long hairs. 



(Europe.) . Smicromyrme, Thomson. 



(Type Mutilla rufipes, Latr.) 



