240 HYMENOPTERA. 



3. PrON^EUS iENEUS. 



Dryinus seneus, Fahr. Syst. Piez. 200. 1. 

 Pronaeus teneus, Latr. Gen. Crust, et Ins. iv. 56. 

 Dahlb. Hym. Europ. i. 24. 1. 



Hab. Guinea ; Port Natal. 



4. PRONiEUS INSTABILIS. B.M. 



Female. Length 15-20 lines. — Head black; the inner orbit 

 narrowly and the outer orbit of the eyes broadly rufo-testaceous ; 

 the antennae and face anteriorly rufo-testaceous, the mandibles 

 ferruginous ; the head is sometimes rufo-testaceous, with merely 

 a black stain enclosing the ocelli ; the mandibles fringed beneath 

 with long hairs. Thorax of an obscure blue-black ; sometimes 

 the metathorax is tinged with green ; the pro- and mesothorax 

 more or less rufo-testaceous, rarely quite black ; the wings nigro- 

 cseruleous ; the legs pale ferruginous, the coxse and trochanters 

 black or fuscous ; the abdomen blue with purple iridescence, the 

 apical segment pale ferruginous : in some examples the apical 

 margins of the second and following segments are more or less 

 rufo-piceous. 



Male. Length 11 lines. — The male has the antennae pale 

 fulvous ; the head, pro- and mesothorax above, the tegulse and 

 legs pale ferruginous ; the three apical segments of the abdomen 

 are also pale. 



Hab. Africa (Guinea ; Congo). 



5. Pron^us affinis. B.M. 



Female. Length 17 lines. — Black : the labrum, anterior mar- 

 gin of the clypeus, the mandibles and antennae, ferruginous. 

 Thorax clothed above with a short black velvety pubescence; 

 the prothorax with a broad, longitudinal, shallow impressed line 

 or channel; wings as in P. instabilis; the tibiae, tarsi and tips of 

 the femora ferruginous ; abdomen obscure blue-black, the apical 

 segment ferruginous. 



Male. Length 12 lines. — Thorax and abdomen as in the 

 female ; the antennae, mandibles and legs pale ferruginous ; the 

 coxae, trochanters and base of the femora black. 



Hab. Port Natal. 



Genus 10. SPHEX. 



Sphex, pt., Fabr. Ent. Syst. ii. 198 (1/93). 

 Pepsis, pt., Fabr. Syst. Piez. 207 (1804). 



