60 Mr. P. Cameron on neto 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 witli 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- 

 })ygidium is a large, stout, slightly curved keel, which becomes 

 gradually larger towards the a))ex 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 i'urrowed down the middle. Radial 

 cellule short, wide ; there are tliree 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. 



Tiie occiput is not sharply margined ; the pronotum is 

 raised behind ; the parapsidal lurrows 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, Cli/peus not hidoitate. 



a. Scutellum distinctly conical. 



Muiilla cona, sp. n. 



Nigra, abdominc rufo, basi apiceque nigris ; capite thoraceque dense 

 argenteo-pilosis ; ecutcUo rugose puactato ; alia fusco-violaceis. jj . 

 Long. 17 mm. 



Scape covered with longish hair, grooved beneath ; the 



