240 HYMENOPTERA 



3. PRON^ETJS 



Dryinus acneus, Fabr. Syst. Piez. 200. 1. 

 Pronaeus aeneus, Latr. Gen. Crust, et Ins. \v. 56. 

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



Hah. Guinea ; Port Natal. 



4. PRON^EUS 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- 

 caeruleous ; the legs pale ferruginous, the coxae 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 antennas pale 

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

 legs pale ferruginous ; the three apical segments of the abdomen 

 are also pale. 



Hab. Africa (Guinea; Congo). 



5. PRONAEUS 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 (17-93). 

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



