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pressed below; the anterior margin of clypeus, instead of being simply 

 and broadly beveled, is preceded by a sharp, elevated and curved, 

 transverse carina. Dorsal surface of propodeum with a médian, longi- 

 tudinal groove bordered by pro minent carinae diverging at their base, 

 their apices strongly elevated and joining in a triangular tubercle 

 at the top of the posterior surface. 



Smicromyrme (Trispilotilla) monteiroae var. charaxiformis 



(Bischoff). 



Maie. Clypeus : upper part smooth and polished, raised, the sides 

 sloping like a roof to a médian ridge which terminâtes abruptly about 

 the middle of the clypeus; each of the sides is circularly depressed, 

 forming a basin; anterior to the ridge the clypeus has a depressed, 

 médian, transverse, smooth and polished area, with a plain front mar- 

 gin. Dorsal surface of propodeum with two longitudinal carinae 

 converging posteriorly and suddenly diverging before the base, en- 

 ding at the junction with the posterior surface in an irregular, not 

 strongly marked, transverse carina. 



Smicromyrme (Trispilotilla) demaculata (Bischoff). 



Maie. Clypeus similar to that of charaxiformis, but the médian ridge 

 of the elevated, upper portion is broadly flattened on top, much less 

 abruptly terminated beneath, and the transverse, impressed basin 

 below is more sharply delimited. Dorsal surface of propodeum with 

 two carina; which converge posteriorly and suddenly diverge before 

 the base, ending posteriorly in an irregular, transverse carina wbich 

 weakly séparâtes the meshes of the dorsal from those of the posterior 

 surface. 



In addition to the différences pointed out above the maies of thèse 

 five species of Trispilotilla are not alike in the shape of the scutellum. 

 While in africana and melanocephala the scutellum is exceedingly 

 prominent and conical to the summit, in demaculata and charaxi- 

 formis it is much less prominent, its summit compressed and as seen 

 from the side sloping convexly in front and abruptly declivous behind. 



