330 HYMENOPTERA. 



50. BEMBEX PLACIDA. 



Male. Length 5-6 lines. Black : the scape in front, clypeus, 

 labrum and mandibles, yellow ; the base of the clypeus and orbits 

 of the eyes pale testaceous ; the face thinly covered with yellowish 

 pubescence. Thorax : the posterior margin of the prothorax, 

 the lateral margins of the mesothorax, two stripes on the disk, 

 the hinder margin of the scutellum, the post-scutellum, a curved 

 line on the metathorax, and its lateral angles, yellow ; beneath, 

 yellow ; the pectus black ; also a black stripe beneath the wings ; 

 a black spot on the trochanters beneath, another at the extreme 

 base of the femora and tibiae ; a narrow black stripe at the apex 

 of the femora above, and a line on the posterior tibiae within ; the 

 claws ferruginous ; the wings hyaline, the nervures black ; a yel- 

 low spot on the tegulse in front. Abdomen : the basal segment 

 has a slightly interrupted yellow fascia, the second segment 

 a broad interrupted fascia on each side enclosing a black dot ; 

 the three following segments have on each side a curved stripe ; 

 the sixth segment has a slightly interrupted straight fascia, the 

 apical segment being yellow at its apex ; beneath yellow, with a 

 central row of black spots, the second segment having on each 

 side at its base a small oblique black spot ; the sixth segment 

 with a minute acute spine in the centre. 



Hab. Columbia. (Coll. W. W. Saunders, Esq.) 



51. BEMBEX AMERICANA. 



Bembex Americana, Fabr.Ent.Syst. ii.250. 9; Syst. Piez. 225. 13. 

 Dahlb. Hym. Europ. i. 183. 



Hab. South America. , 



52. BEMBEX BRULLEI. 



Bembex Brullei, Guer. Voy. Coq.ZooL pt. 2. p. 263, .4 to, t 9. f. 3. 

 Spin. Gay's Chili, vi. 318. 1. 



Hab. Chili. 



53. BEMBEX SULPHUREA. 



Bembex sulphurea, Spin. Gay's Chili, vi. 319. 2. 

 Hab. Chili. 



54. BEMBEX VENTRALIS. 



Bembex ventralis, Dahlb. Hym. Europ. i. 180. 

 St. Farg. Hym. iii. 2?8. 13. 



Hab. Chili; Valparaiso. (Coll. F. Smith.) 



