446 MEMOIRS OF THE CARNEGIE MUSEUM 



ment of the abdomen is wholly black, the petiole being hardly longer than thick- 

 The hind femora are armed with one large tooth followed by fifteen or sixteen 

 minute black teeth. 



Brazil : Corumba ; Porto Branca ; West Indies : Trinidad. 



Spilochalcis paraguayensis, sp. nov. 



Male. — Length 6 mm. Yellow, marked with black as in S. corumbse, except that 

 the scutellum has a slender black line across the base and a triangular spot at apex ; 

 the hind coxae have the apex black ; the hind femora have black spot at apex as in 

 S. corumbse, but a large tooth is followed by seventeen or eighteen minute black 

 teeth. The abdomen is fusiform, the petiole being three times as long as thick. 



Paraguay : Villeta. One specimen. 



Spilochalcis dimidiata, sp. nov. 



Male. — Length 4.5 mm. Yellow ; a spot on occiput, the ocelli, a small spot on 

 each side of the dorsum of the pronotum, a quadrate spot at the base of the middle 

 mesothoracic lobe, just in front of the scutellum, and two short longitudinal lines 

 anteriorly, a spot on the lateral lobes, a triangular spot at apex of the scutellum, and 

 the apical half of the abdomen, black. The body of the abdomen is ovate, the 

 petiole being long, a little more than four times longer than thick. The hind fem- 

 ora are armed with sixteen or seventeen minute, black teeth. 



Brazil : Chapada, in October. One specimen. 



Spilochalcis mekidionalis, sp. nov. 



Female. — Length 4 mm. Yellow; the occiput, the flagellum, two triangular 

 spots on the anterior margin of the middle mesothoracic lobe, a faint dot on the 

 lateral lobes, the axillae and a spot at base of scutellum, a median line on the meta- 

 notum and its apex, the extreme apex of hind coxse, a spot at apex of hind fem- 

 ora, and the sheaths of the ovipositor, black. 



The abdomen is conic-ovate, the petiole being a little moi'e than three times as 

 long as thick ; the dorsal segments are more or less stained with brown or fuscous. 



The hind femora are armed with one large acute tooth, followed by thirteen or 

 fourteen smaller teeth, those near the apex being very minute. 



West Indies : Trinidad. One specimen. 



Spilochalcis tripunctata, sp. nov. 

 Male. — Length 3.5 mm. Yellow ; a spot on the occiput, the flagellum above, the 

 sutures surrounding the middle mesothoracic lobe, a minute spot on the disk of 

 the lateral lobes, an elongate spot on the middle of the middle lobe, a delicate longi- 



