428 MEMOIRS OF THE CARNEGIE MUSEUM 



notum immaculate S. corvmbse. 



76. Scutellum with a transverse black line at base, usually in the basal sutui-e 77 



Scutellura with two black spots at base, connected with a black line in the basal suture ; a small black 



spot at apex. 



Lateral mesothoracic lobes with a black spot at apex ; abdomen fusiformly pointed, the tip alone 

 black, the petiole only a little longer than thick ; 9 S. descripta Walker. 



77. Hind femora with a small black spot at apex ; scutellum with a small triangular black spot at apex ; 



abdomen conic-ovate, the petiole about twice as long as thick ; (^ S. paraguayensis. 



78. Thorax yellow, a puncture on each side of pronotum, a spot on the lateral mesothoracic lobes, two 



short lines on the middle lobe anteriorly and a spot posteriorly near the scutellum, a spot on the 

 axillae and a spot at apex of scutellum, black ; legs immaculate ; apical half of abdomen black, the 

 petiole nearly five times as long as thick ; (J" ^S". dimidiata. 



79. Thorax yellow but with the middle mesothoracic lobe with one or more black spots 80 



Thorax yellow but with the middle mesothoracic lobe immaculate, the lateral lobes with a black spot. 



81 



80. Middle mesothoracic lobe wdth two black spots anteriorly ; apex of metathorax black ; legs yellow, the 



extreme apex of hind coxae black, the hind femora with a small black spot at apex. ..(S. meridionalis. 



Middle mesothoracic lobe with a small central black spot, the lateral lobes with a minute black spot ; 



scutellum with a delicate median black line ; abdomen fusiform ; segments two to six with fuscous 



bands ; c? S. tripunctata. 



81. Scutellum immaculate ; abdomen subglobose ; hind femora with two black spots S. bipunctata. 



82. Abdomen in 9 fusiformly pointed, the sheaths of the ovipositor black, the petiole not quite twice as 



long as thick (in c? three or more times longer than thick) S. flava Fabricius. 



Spilochalcis taesalis, sp. nov. 



Female. — Length 5.5 mm. Black, coarsely punctate ; front orbits, face below the 

 insertion of the antennae, hind orbits, scape beneath, the hind margin of the prono- 

 tum, except medially, a line on each side of the scutellum, the base and apex of 

 front tibise, all tarsi, and the petiole of the abdomen, yellow. Abdomen subglobose, 

 polished black, except a reddish spot at base beneath. 



Brazil : Chapada, in May. One specimen. 



Spilochalcis atrata, sp. nov. 



Female. — Length about 7 mm. (Head lost.) Black, coarsely punctate ; hind 

 margin of protonum, a spot on the hind angles of the parapsides, a line across the 

 base of the scutellum and the ridge at apex, and the front knees and tarsi, yellow, 

 the tarsal joints more or less dusky medially. 



Brazil : Santarem. One specimen in bad condition. 



Spilochalcis santaremensis, sp. nov. 

 Female. — Length 5.5 to 6 mm. Black, coarsely punctate ; front and hind orbits, 

 scape, pronotum above, teguke, apical half of scutellum, except the ridge at apex, 



