COLLECTED IN BOENEO, ETC. 9S 



pile, which is more dense on the coxae and femora beneath ; the pos- 

 terior margin of the prothorax, and a minute spot on the outer margin 

 of the tegulse, yellow ; the wings hyaline, with a dark fuscous cloud 

 at the apex of the anterior pair : the second subraarginal cell twice 

 the width of the third, which is subangular ; the nervures fuscous ; 

 the calcaria and posterior tibiae ferruginous, the latter black at their 

 extreme base and apex ; the tibiae and tarsi spinose ; the anterior tarsi 

 ciliated. Abdomen covered thinly with a fine changeable pile ; a trans- 

 verse yellow fascia near the base of the second and third segments, 

 the first slightly interrupted in the middle, both widest at the sides ; 

 a narrow transverse yellow fascia in the middle of the fifth segment, 

 slightly produced upwards in the middle. 



Hab. Borneo (Sarawak). 



This species has a strong resemblance to the P. variegatus of Europe, 

 but from which it is abundantly distinct. 



3. PoMPiLus PULVERosus. P. atcr, pubeque cinerea tectusj alis 

 hyalinis apice nigro-fuscis. 



Male. Length 4 lines. Black ; entirely covered with a fine glittering 

 white silky pile ; the face silvery ; head and thorax smooth, shining 

 and impunctate ; the hinder margin of the prothorax subangular ; the 

 wings hyaline and iridescent, with a slight fuscous cloud beyond the 

 first submarginal cell ; the nervures dark fuscous ; the legs spinose, 

 with their calcaria nearly as long as the basal joint of the tarsi. Ab- 

 domen with a faint tinge of blue in certain lights. 



Hah. Borneo (Sarawak). 



Subgen. Peiocnemis, Schiodte. 



4. PrIOCNEMIS SERICOSOMA. 



Pompilus sericosoma. Smith, Cat. Hym. p. 146. no. 137. 

 Hab. Sumatra. Borneo (Sarawak). 



5. Priocnemis optimus. p. atra, capite, thorace, dorso metatho- 

 racisque lateribus et maculis basi, coxis intermediis, aureo-pubescenti- 

 bus; alis nigro-fuscis; femoribus posticis ferrugineis, basi apiceque 

 nigris. 



Female. Length 8 lines. Black ; the head and scape above covered 

 with golden pubescence ; the clypeus convex, somewhat produced in 

 the middle of its anterior margin, which is slightly emarginate and 

 recurved ; the apex of the mandibles ferruginous. Thorax : the pro- 

 thorax, mesothorax, scutellum, and sides of the metathorax posteriorly, 

 covered with golden pubescence ; a golden spot at the sides of the 

 pectus, close to the base of the intermediate coxae ; the wings dark 

 fuscous with a beautiful violet iridescence ; the posterior margin of 

 the inferior pair subhyaline ; legs elongate, the middle of the posterior 

 femora ferruginous ; the intermediate and posterior tibiae with a 



