524 MR- R- E. TURNER ON [May 12, 



The recurrent nervure is received by the cubital cell at two- 

 thirds from the base. The posterior tibiae are much swollen 

 towards the apex. 



Length 12 mm., exp. 17 mm. 



Hah. Victoria {French) ; Tasmania. 



The specimen from Tasmania has the wings fusco-hyaline. 



Crabro (Rhopalum) tricolor Sm. 



Crahro tricolor Sm, Cat. Hym. B. M. iv. p. 394. n. 14, 1855, c^ . 



2 . Mandibles bidentate at the apex, the outer tooth very small. 

 Clypeus convex in the middle and subcarinate, produced in the 

 middle of the apical margin and emarginate, the angles of the 

 emargination forming strong blunt teeth, a small tooth on each 

 side ; the whole clypeus clothed with shining silvery pubescence. 

 Antennfe inserted close to the eyes, the distance between the eyes 

 at their base about equal to the length of the second joint of the 

 flagellum; the first joint of the flagellum about half as long as 

 the third, and a little more than half as long as the second. The 

 posterior ocelli nearer to each other than to the eyes and nearei- 

 to the anterior ocellus than to each other, with a feeble longi- 

 tudinal carina between them. Head and thorax opaque, very 

 closely and minutely punctured, the front smooth and shining, 

 the groove for the scape occupying the entire breadth, the 

 posterior margin of the head broadly emarginate. Pronotum 

 short, strongly narrowed anteriorly ; the mesopleurte less opaque 

 than the mesonotum. Median segment steeply sloped posteriorly 

 and rounded, the space at the base opaque, very finely rugose, 

 with a sulcus from the base to the apex and a few very short stria? 

 from the base. Abdomen petiolate, opaque, very minutely jDunc- 

 tured ; the first segment long and slender, swollen at the apex, 

 a little longer than the second, the second and third gradualty 

 widened, the fourth the broadest ; the fifth dorsal segment clothed 

 with short, close, fulvous pubescence. The ejjipygium is tri- 

 angular, opaque, the sides slightly raised. The posterior tibia- 

 strongly swollen to the apex. The recurrent nervure is received 

 by the cubital cell just before three-quarters from the base. 



Black ; the scape of the antennae, the apex of the tegulfe. the 

 tarsi, the anterior and intermediate tibiae, and the apex of all the 

 femora and of the ]3osterior coxae yellow ; the base and apex of the 

 second abdominal segment and the base of the third ferruginous ; 

 the tarsal ungues black. Wings hyaline, faintly tinged with 

 fuscous ; nervures fuscous. 



S . As in the female. 



Length, 5 13 mm., c? 11 mm. 



Hah. Woodford, Blue Mts, N. S. Wales {G. A. Waterhouse) ; 

 Victoria {French) ; Tasmania {Smith). 



Crabro (Rhopalum) tenuiventris, sp. n. 



2 . Mandibles feebly bidentate at the apex. Clypeus clothed 



