468 MEMOIES OF THE CAENEGIE MUSEUM 



Genus OEASEMA Cameron. 

 Orasema festiva (Fabricins). 



Eucharis festiva Fabricius, Syst. Piez., 1804, p. 157. 



Orasema festiva Kirby, Journ. Linn. Soc. London, Zool., XX., 1886, p. 29. — Dalla 

 Torre, Cat. Hym., V., 1898, p. 361. 

 Brazil. 



Orasema rapo (Walker). 

 (Plate XXXIV., Fig. 5.) 



Eucharis rapo Walker, Monogr. Chalc, II., 1839, p. 66, 9. 



Orasema rapo Kirby, Journ. Linn. Soc. London, Zool., XX., 1886, p. 26. — Dalla 

 Torre, Cat. Hym., V., 1898, p. 361. 

 Brazil : Chapada, in April ; Santarem ; Corumba, in May. Fifteen specimens. 



PSEUDOCHALCURA Ashmead, gen. nov. 

 This genus resembles Chalcura Kirb}^, but the wings are hyaline, witJiout a fus- 

 cous spot, and the antennse, in the male, have only /our branches. 



PSEUDOCHALCXJRA NIGROCYANEA, Sp. noV. 



(Plate XXXIV., Fig. 6.) 



3fale. — Length 3.5 mm. Blue-black, coarsely, reticulately punctate, with a 

 faint seneous tinge above, the trochanters, apices of femora and all tibse and tarsi, 

 and the scape and pedicel of antennse honey-yellow, the flagellum brown-black or 

 brown, paler towards apex, joints one to four each with a long branch above. The 

 abdomen is seneous black, with a very long petiole, the length of the hind femora, 

 the body subcompressed, viewed from the side sub triangular. 



Female. — Length about 4 mm. Agrees fairly well with the male except that 

 the flagellum is brown, joints one to four acutely lobed above, while the abdomen 

 is larger, the petiole much shorter, being hardly two thirds the length of the hind 

 femora. 



Brazil : Chapada, in April. Six specimens. 



Genus STIBULA Spinola. 



Stibula nigriceps, sp. nov. 



(Plate XXXV., Fig. 2.) 



Male. — Length 3 mm. Brownish-yellow, the head, except the eyes which are 

 brown, being entirely black ; the flagellum from the second joint is brown-black, 

 the scape, pedicel, and the first joint of the flagellum being 3^ellow ; the first joint 

 of the flagellum is very long, more than twice as long as the scape. 



