468 Mr. Cameron on 



may be the obtuse tubercles of Smith]. Abdomen elongate, 

 narrow, sessile, longer than the head and thorax united ; 

 sharply pointed at the apex, and bearing some long black 

 hairs ; the apical segment very smooth and shining. 

 Antennae shorter than the abdomen, tapering perceptibly 

 towards the apex, not convolute. Wings comparatively 

 short ; the radial cellule about twice longer than wide ; the 

 radial nervure curved at both ends ; second cubital cellule 

 at top half the length of the botto m, where it is a little 

 longer than the third ; the third with a petiole as long as 

 three-fourths of the top of the second cubital cellule ; the 

 third cellule narrowed at the top, but not forming a triangle, 

 both the nervures being distinctly curved ; the first recurrent 

 nervure very oblique and received near the apex of the 

 cellule ; the second in the middle. Legs pruinose ; the 

 spines long, black ; the base of the hind femora and apex 

 of the tibiae black ; the long spur of the hind tibiae reaches 

 to the middle of the metatarsus. The cloud in the fore 

 wings commences at the apex of the radial cellule. 



What is probably a variety has the hind tibisB black ; 

 this form being also smaller. 



Length, 12 mm. 



POMPILUS VIVAX, sp. nov. (PI. IIL f 1 4). 



Black, pruinose, the scape beneath, the edge of the prono- 

 tum and tegulae yellowish, the face, the scutellum, apex of 

 median segment, coxae, and base of abdomen densely covered 

 with a thick greyish silvery pubescence ; wings subhyaline, 

 the apex infuscated ; second cubital cellule petiolate. Eyes 

 a little converging beneath ; ocelli in a curve, the hinder 

 separated from the eyes by a distinctly less distance than 

 they are from each other ; apex of clypeus in the middle 

 forming a shallow curve ; the sides oblique ; occiput trans- 

 verse ; the sides rounded. The pubescence below the 



