HYMENOPTERA. 



265 



3. IIarpactopus s^vus. B.M. 



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

 with bright silvery pubescence ; the cly]jeus 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 apical margins 

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

 thickly s})ined, the anterior pair strongly ciliated outside. Ab- 

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

 than the first segment. 



The male only difl'ers 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 

 pile; the spines at the apex of the tibiae black, those on the 

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

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

 the post-scutellum with a slightly raised 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, i)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 Thomffi, Fabr. Syst. Fiez. 209. 5. 

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



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

 (Santarem); South Carolina ; East Florida. 



