436 MEMOIRS OF THE CARNEGIE MUSEUM 



thoracic lobe is black broadly margined with yellow, the lateral lobes black marked 

 with yellow along the outer sides ; the scutellum is yellow with a large, triangular, 

 central black spot, and a transverse black line at base, dilated on the axillse ; the 

 metathorax has a transverse black line at base. The abdomen is fusiform, pale fer- 

 ruginous, except the petiole, the dorsum with four or five brownish bands, the 

 sheaths of the ovipositor black ; the petiole is yellow and about five times as long 

 as thick. The hind femora are armed with thirteen or fourteen black teeth, while 

 the hind tibise have a black spot on the outer face near the middle. 

 Brazil : Santarem. One specimen. 



Spilochalcis nigropleuralis, sp. nov. 



Female. — Length 4.3 mm. Lemon-yellow, marked with black as follows : The 

 occiput and a small spot in front of the lateral ocelli black ; fiagellum black ; pro- 

 notum with a small spot on each side and a large median spot on the decliv- 

 ity or front face, black ; mesothorax black, the lobes margined with yellow, the 

 middle lobe also with a small yellow spot anteriorly ; scutellum yellow, with a 

 transverse line across the base, dilated on the axillae, and a wedge-shaped central 

 spot, black ; basal suture of metathorax, the pleurae, except spots beneath the inser- 

 tion of the wings, black ; the body of the abdomen is short, subovate, the dorsal 

 segments two to seven medially more or less black ; all the legs are yellow but 

 marked with black as follows : The hind coxae at apex, the trochanters, two large 

 spots on the outer and inner face of hind femora and the base of the hind tibiae, are 

 black. 



Male. — Length 4 mm. Colored and marked nearly as in the female, except the 

 yellow spot on the middle mesothoracic lobe is greatly enlarged and divides the 

 black into two parts, while the pleurae, except the femoral furrow, are yellow. 



West Indies : Trinidad ; Brazil : Chapada. 



Spilochalcis corumbicola, sp. nov. 



Male. — Length 6 mm. Lemon-yellow ; occiput, scrobes and the scape above, 

 black ; fiagellum brown-black, fulvous beneath ; pronotum with a median spot on 

 the front face and a small spot on the dorsum opposite the parapsidal furrows, black ; 

 mesothoracic lobes black margined with yellow, the middle lobe also with a yellow 

 median spot ; scutellum with a transverse black line at base and a narrow black 

 line down the center ; hind femora with a small rounded spot on outer and inner 

 face and the minute teeth, about fourteen, black. The body of the abdomen is oval, 

 mostly ferruginous, the dorsal segments tinged with fuscous basally, while the petiole 

 is yellow and about twice as long as thick. 



Brazil : Corumba, in April. One specimen. 



