196 HYMENOPTERA. 



an elongated V-shaped mark formed of short bright silvery pu- 

 bescence, not quite reaching the base of the wings ; the legs 

 have a deep violet splendour, and the abdomen partakes of a 

 similar colouring. 



Hab. Brazil (Amazons). (Coll. W. W. Saunders, Esq.) 



27. Pepsis venusta. B.M. 



Male. Length 10 lines. — Black: the entire insect clothed 

 with a dark blue-green pilosity, varied with black in certain 

 lights ; the apical joint of the antennae orange ; the wings black, 

 with varying shades of metallic blue and green in different lights, 

 the apex of the anterior wings white, the white commencing at 

 the extreme apex of the marginal cell ; the abdomen bright green, 

 very rich and vivid in certain lights ; the metathorax trans- 

 versely rugose and black. 



Hab. Brazil (Tapajos). 



28. Pepsis deuteroleuca. B.M. 



Male. Length 10-12 lines. — Black : clothed with an obscure 

 blue pilosity, which in certain lights is intensely brilhant, parti- 

 cularly on the insect beneath ; antennae black ; the metathorax 

 transversely rugose-striate, its posterior lateral angles slightly 

 produced ; wings black and shining, the posterior pair white at 

 their apex, in some specimens the tips are yellowish-white ; the 

 abdomen has a thick floccus of hair on each side of the fourth 

 segment beneath. 



Hab. Brazil (Santarem). (Coll. H.W. Bates.) 



29. Pepsis terminata. B.M. 



Pepsis terminata, Dahlb. Hym. Europ. i. 120. 6. 

 Pepsis ornata, St. Farg. Hym. iii. 486. 29. 



Hab. South America. 



30. Pepsis nigrescens. B.M. 



Male. Length 14 lines. — Black : clothed with short black 

 velvety pubescence ; the cheeks, prothorax and metathorax 

 having a long thin black pubescence ; the legs have a dark purple 

 pilosity, observable in certain lights ; the metathorax elongate, 

 transversely rugose, convex in the middle, longitudinally de- 

 pressed on each side, and subcarinate at its lateral margins, which 

 are slightly produced posteriorly; wing dark blackish-brown, 

 and having a splendid violet and blue iridescence. Abdomen 



