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converging lines behind the eyes, meeting the hind margin at an ob- 

 tuse angle emphasized by a vertical carina; médian portion of the hind 

 margin abruptly emarginate; the carina at the postero-lateral angles 

 continued on the under surface where it ends behind in a tooth. Front 

 and vertex closely but rather finely striato-punctate; the vertex with 

 a small, polished, impunctate, médian strip of irregular outline. 

 Antennal tubercles elevated into acute spines, but little closer to 

 each other than they are removed from the eyes. Antennal grooves, 

 margined by a very fine carina. Superior portion of clypeus with a 

 sinuate ridge which curves upward closely between the bases of the 

 antennae. Mandibles stout, on the whole very slightly curved, the 

 upper edge with a broad basai lobe occupying the entire basai half; 

 the outer margin of this lobe at right angle to the inner margin of 

 the mandible; the lobe forming ahuge, erect tooth which covers the 

 greater part of the clypeus when the mandible is closed and almost 

 meets the parallel margin of the corresponding lobe of the other 

 mandible; apex of mandible slender and acute, with a small inner 

 tooth; a ridge extending from the acute apex of the inner lobe to the 

 condyle. Second segment of flagellum elongate, longer than the two 

 following united. Dorsum in dorsal view with parallel sides, inter- 

 rupted by several short teeth; the humerai angles sharp; dorsum a 

 little more coarsely striato-punctate than the head. Upper angle of 

 the propodeum with a médian and two latéral long spines between 

 which are some irregular, very short teeth, the extrême side with 

 a short, curved spine; posterior face truncate; its latéral margins 

 weakly toothed. First segment curving broadly into the second, with- 

 out constriction, but without a dorsal surface. Second segment 

 broadly ovate; its tergite closely, uniformly, but not coarsely punctate. 

 Pygidial area long oval, rather pointed, entirely impunctate and 

 shiny, testaceous. 



Habitat : Belgian Congo, one female, Congo da Lemba, May, 

 1912 (R. Mayné). 



Holotype : Congo Muséum, Tervueren. 



The extraordinary mandibles of this species, with the broad, erect, 

 basai tooth, closing over and hiding the surface of the clypeus, dis- 

 tinguish it from any mutillid with which we are familiar. Among the 



