462 Mr. Cameron on 



POMPILUS (FERREOLA) ARIADNE, Sp, nov, (PI. III. f. /, J a). 



Black, the spurs white, palpi yellow, mandibles reddish, 

 wings subhyaline. Head smooth and shining, sparsely 

 pubescent ; eyes arcuate, equally converging at top and 

 bottom ; ocelli large, in a curve ; the posterior separated 

 from each other by more than twice the distance they are 

 from the eyes. Head convex in front, concave behind ; 

 antennae placed immediately over the clypeus, over which 

 the front projects; clypeus rounded at the apex. Prothorax 

 quadrate, longer than the head, not narrowed towards the 

 head ; behind almost transverse. Pleurae compressed, 

 impunctate, almost glabrous. Median part of scutellum 

 broad, a little narrowed towards the apex ; median segment 

 longer than the mesothorax ; depressed in the middle at 

 the apex ; the lateral projections acutely triangular ; the 

 apex bearing depressed longish hairs. Abdomen sessile, 

 compressed laterally ; the third and following segments 

 covered with dense silvery hairs. Legs stout ; the tarsi 

 testaceous ; the long and stout calcaria longer than the 

 metatarsus ; claws bifid. For wings see fig. 7, pi. HI. 



Length, 6 mm. 



Hab, Barrackpore {Rothney). 



A very distinct little species. 



POMPILUS (FeRREOLA) HECATE, Sp. nov. (PL HI. f 8). 



Black, pruinose, the face densely covered with a silvery 

 pile, the wings hyaline, the apex infuscated. Eyes broadly 

 arcuate, a little converging beneath ; ocelli large, almost 

 forming a triangle, the posterior separated from each other 

 by a greater distance than they are from the eyes. Clypeus 

 short, transverse, the sides rounded. Head behind very 

 little developed, and almost transverse. Prothorax not 

 much longer than the head ; almost transverse behind, not 

 much narrowed in front. Median part of scutellum narrowed 



