HYMENOPTERA. 265 



3. Harpactopus SiEvus. B.M. 



Female. Length 8-11 lines. — Black : the face densely covered 

 with bright silvery pubescence ; the clypeus sprinkled with stiff 

 black bristly hairs ; the vertex and cheeks have a thin cinereous 

 pubescence. The pro- and mesothorax covered with pale golden 

 pubescence ; the metathorax transversely rugose ; the wings 

 hyaline, with more or less of a yellow tinge, their aj)ical margins 

 slightly clouded ; the nervures pale rufo-testaceous ; the tarsi 

 thickly spined, the anterior pair strongly ciliated outside. Ab- 

 domen subglobose, very convex, with the petiole a little longer 

 than the first segment. 



The male only differs in being smaller and more pubescent. 



Hab. Australia (Swan River; Cape Upstart). 



4. Harpactopus nivosus. B.M. 



Female. Length 10-13 lines. — Ferruginous : the head, tips 

 of the mandibles and flagellum black ; the head, thorax, coxae 

 and base of the femora densely clothed with snow-white short 

 silky pubescence ; the other parts of the legs have a thin white 

 ])ile; the spines at the apex of the tibia? black, those on the 

 tibise and tarsi are a mixture of black and red ones ; the wings 

 hyaline, the nervures fusco-ferruginous, the tegula; ferruginous ; 

 the post-scutellum with a slightly I'aised tubercle in the middle. 

 Abdomen : the petiole and first segment covered with snow- 

 white pubescence ; the apical margins of the segments pale rufo- 

 testaceous. 



Hab. Northern India. 



Genus 12. PRIONONYX. 



Sphex, pt., Fabr. Ent. Syst. ii. 198 (1793). 

 Pepsis, ])t., Fabr. Syst. Fiez. 207 (1804). 

 Priononyx, Dahlb. Hym. Europ. i. 28 (1843). 



This genus differs from the genus Sphex in having the claws 

 quadridentate beneath at their base ; the neuration of the wings 

 and the form of the abdomen are the same as in Harpactopus. 



\. Priononyx Thom^e. B.M. 



Sphex ThomjE, Fabr. Ent. Syst. ii. 199. 4. 

 Pepsis Thomaj, Fabr. Syst. Fiez. 209. b. 

 Priononyx Thomfc, Dahlb. Hym. Europ. i. 28. 1. 



Hab. South America ; Island of St. Thomas ; Jamaica ; Brazil 

 (Santarem) ; South Carolina ; East Florida. 



