444 MEMOIRS OF THE CARNEGIE MUSEUM 



hind femora are armed with sixteen or seventeen small black teeth ; while the 

 abdomen is subgiobose, the dorsal segments stained with black or piceous, the petiole 

 about three times as long as thick. 



Brazil : Porto Branca. One specimen. 



Spilochalcis vagabunda, sp. nov. 

 Female. — Length 7.5 mm. Yellow, the head and thorax marked with black as 

 in S. brancensis but structurally it is quite different : The head is broader, not 

 deeply semicircularly emarginate in front ; the abdomen is conically pointed, longer 

 than the head and thorax united, the sheaths of the ovipositor black, the petiole 

 short, not longer than thick ; some of the dorsal segments are more or less banded 

 with brown or black ; the hind coxae have a black spot at apex, their femora have 

 a black line at base and along the lower or serrate edge, the same being connected 

 with an arcuate black mark on the outer face and a spot at apex. The hind femora 

 are armed with about eighteen minute black teeth. 



Brazil : Santarem. 



Spilochalcis lanceolata, sp. nov. 



Female. — Length 5.5 mm. Colored and marked with black much as in S. vag- 

 dbunda, except that the pleura are immaculate, the hind femora have a black spot 

 only at apex and are armed with only fourteen minute black teeth. It also differs 

 decidedly in the shape of the abdomen, which is long, lanceolate, the petiole being 

 much longer, at least three times as long as thick. 



Brazil : Santarem. 



Spilochalcis vau, sp. nov. 



Female. — Length 5 mm. Yellow ; a spot on the occiput, a V-shaped mark on 

 the middle mesothoracic lobe anteriorly, not connected with a black line posteriorly, 

 a spot on each lateral lobe, a line across the base of the scutellum and an abbrevi- 

 ated longitudinal line on the disk, a line in the mesopleural furrow, an oblong mark 

 on the outer face of the hind femora, the abdominal petiole, and bands on dorsal 

 segments of the abdomen, black ; scape and pedicel wholly yellow (flagellum broken 

 off). The abdomen is ovate, the petiole being long, about six times as long as thick. 

 The hind femora are armed with about fifteen minute black teeth. 



Brazil : Chapada, in April. One specimen. 



Spilochalcis incompleta, sp. nov. 

 Female. — Length 6.0 mm. Yellow : marked with black as in S. vau, only the 

 loop on the middle mesothoracic lobe is open, posteriorly and there is a black line 

 extending from it to the base of the scutellum, the scape has a black line above, the 



