60 Mr. P. Cameron on neio Fossorial Hymenoptera 



fuscous, the radial cellule short and wide ; the basal abscissa 

 of the radius is sharply and distinctly angled above the 

 middle ; the apical is straight above, oblique below ; the 

 second and third cubital cellules are equal in length above ; 

 the first recurrent nervure is received shortly beyond, the 

 second almost in the middle of, the cellule; the radial and 

 cubital cellules are lighter in tint than the apex of the wings. 

 Abdomen black ; the second, third, and the base of the fourth 

 segments ferruginous; the petiole is coarsely punctured, its 

 apex and the apices of the second and third segments are 

 fringed with golden pubescence ; the other segments are 

 fringed with white ; the pygidium is covered with long black 

 hair ; the ventral keel is curved, its apex projecting into a 

 large somewhat triangular tooth ; on the sides of the hypo- 

 pygidium is a large, stout, slightly curved keel, which becomes 

 gradually larger towards the apex as seen from the sides. 



This species forms the type of a new group, which may be 

 defined as follows : — 



Clypeus largely projecting, becoming broader from the base 

 to the apex and hollowed in the middle; the apex ends in 

 two large somewhat triangular teeth. Mandibles longish, the 

 apex ending in one long tooth ; the lower tooth is large. 

 Ocellar region raised. Eye-incision rounded at the base. 

 Pronotum raised behind. Mesonotum without longitudinal 

 furrows. Scutellum furrowed down the middle. Radial 

 cellule short, wide ; there are three cubital cellules. Basal 

 segment of the abdomen subsessile ; the last ventral segment 

 provided on either side with a stout keel, which becomes 

 gradually wider towards the apex. On the inner side of the 

 hinder coxae at the apex is a stout shining tooth, rounded at 

 the apex. 



The occiput is not sharply margined ; the pronotum is 

 raised behind ; the parapsidal furrows distinct; on the lower 

 side of the second abdominal segment is a longitudinal keel, 

 covered with a short pile ; below this is a smooth, glabrous, 

 broader keel. 



ii. Clypeus not bidentate. 



a. Scutellum distinctly conical. 



Mutilla cona, sp. n. 



Nigra, abdomine rufo, basi apiceque uigris ; capita thoraceque dense 

 argenteo-pilosis; scutello rugose punctato; alis fusco-violaceis. J . 

 Long. 17 mm. 



Scape covered with longish hair, grooved beneath ; the 



