OLIGOMYBMEX. 153 



posteriorly emarginate, the sides convex, the posterior lateral 

 angles well marked though not prominent ; mandibles broad, 

 triangular, the masticatory margin dentate, the apical two teeth 

 long and acute ; clypeus not or only feebly bicarinate, its anterior 

 margin more or less emarginate in the middle, truncate or obtusely 

 angular posteriorly ; frontal area distinct, triangular ; antennae 

 9-jointed ; club of flagellum formed of the apical two joints, of 

 which the apical joint of all is very long, the club longer than the 

 rest of the flagellum ; eyes comparatively large and round, lateral, 

 situated about the middle of the head. Thorax : the pronotum 

 rounded anteriorly, convex, not forming any portion of the dorsum ; 

 mesonotum broadening posteriorly, convex, but not gibbous ; 

 scutellum convex, slightly prominent; metanotum more or less 

 vertical or steeply declivous, with or without a blunt tooth or 

 tubercle on each side. Pedicel : the 1st node shortly petiolate 

 anteriorly, the petiole gradually thickening up to the node ; 2nd 

 node more or less rectangular, often broader than long ; abdomen 

 broadly oval, rather massive and bluntly rounded posteriorly. 

 Fore wing with one rhomboidal cubital cell. 



maj. Resembles the $ , but with the sexual differences in the 

 shape of the thorax and abdomen ; the clypeus (in the one Indian 

 species of which the is known) is bicarinate, the carinae 

 convei'gent posteriorly, anteriorly not emarginate; antennas 9- 

 jointed as in the $ ; eyes exceedingly small. Thorax : the pro- 

 mesonotal suture obsolete, the pro-mesonotum forming a strong 

 convexity ; the thorax constricted and emarginate at the meso- 

 metanotal suture, which is strongly marked ; basal portion of 

 metanotum flat, rectangular, laterally submargined, a little longer 

 than the subvertical apical portion. Pedicel short, the 1st node 

 shortly petiolate, transverse, flat anteriorly and posteriorly, with a 

 distinct anterior and posterior margin above ; 2nd node rounded, 

 transverse, about as broad as the 1st node and (seen from above) 

 a little longer ; abdomen very long and massive. 



min. Resembles the $ maj., but is smaller and entirely without 

 eyes, blind : antennae similar, but the apical joint in itself as long 

 as the rest of the flagellum. Head rounded posteriorly. Pedicel 

 short, the nodes rounded, the anterior node not petiolate ; abdomen 

 small. 



c? . Head more or less square ; mandibles either dentate or 

 pointed; the antennae with 13 joints. Thorax shorter and broader 

 than that of the $ , but similar to it. Pedicel with the nodes low 

 and broad ; abdomen smaller and narrower than in the $ . Wings 

 as in the $ . 



The genus was discriminated by Mayr from the characters as 

 they exist in the $ . I have therefore in the description of the 

 genus given the characters of the $ first. The characters of the 

 $ as given above are probably more or less faulty, as the $ only 

 of one species is known to me, and that may possibly be an aberrant 

 form. 



