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 beneatli 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 tegulje in front. Abdomen : the basal segment 

 has a slightly interrupted yellow fascia, the second segment 

 a broad interrujited 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 Amer'\cana,Fabr.Ent.Syst.u.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. 2m,Atlas,t. 9. f. 3. 

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



Hab. Chili. 



53. Bembex sulphurea, 



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

 Hab. Chih. 



54. Bembex ventralis. 



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

 St. Farg. Hym. iii. 278. 13, 



Ha6, ChiH; Valparaiso. (Coll. F. Smith.) 



