292 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XIV. 



yellow mark whicli is broader than long ; the apex is narrowed in the 

 middle and is broadl)-, but not deeply, inoised. The front smd vertex 

 are strongly and closely punotured and covered with silvery pubes- 

 cence. Mandibles smooth and shining ; keeled along the inner and 

 outer sides above. Thorax closely, uniformly and rather strongly 

 punctured ; the median segment more closely, and not quite so dis- 

 tinctly as the mesofhorax. Shortly behind the apex of the middle of 

 thescutellam are two curved yellow marks; in front of it, on the 

 mesoiotnm, is a short, longitudinal furrow. Legs black ; the ajjcx of 

 the four anterior fomo'a, and the four anterior tibiae, except behind, 

 yellow. Wings hyaline ; the cost;d and the radial cellule for the 

 greater part sm^ky ; the second cubital cellule is narrowed at the top, 

 the two transvprs'j cubital nervures being united there ; the third 

 cellule is widest at the top ; the cubitus does not extend beyond it. 

 The petiole is as long as the rest of the abdomen united ; it is not 

 much widened towards the apex ; sibove it is irregularly punctured ; 

 the sides are rufous except at the base and apex ; its apex and the apex 

 of the second segment yellow. The secf nd se<^ment is bell-sha[)ed, 

 roundly narrowed at the base, tlie apex transverse. 



The pronotum above is transverse ; its edgns projict shar| ly ; in 

 additiou to two short central farrows on the apex of the m^so- 

 notum there is a soui*-nvhat longer carved one on either side of them ; 

 there is no groove or kael on the me'lian segment, the apex of which 

 is roundly incised, the sides projecting into blunt 1}^ rounded }ellowish 

 teeth ; its apex has a perpendicular slope ; the biise of the peiiole is 

 not perceptibly narrowed. 



The $ has the clypeus yellow except at the apex where it projects 

 into two teeth ; the a])ical joint of the antenna is short, longer than 

 broad ; the spine is hmger thiin it. "' 



The form of the wing cellules is ns in Lahis ; the petiole is not 

 narrowed at the base as in typical Zethus ; the antenr.se are placed dis- 

 tinctly ahove the top of the clypeus ; the mandibles have a large, 

 rounded suh-apical tooth, which is clearly separated ; they are of 

 moderate length ; the scutellum is flat, separated from the mesonotum 

 by a furrow ; its apex behind the yellow marks is stoutly, Icngitudi- 

 nally striated. 



This species cannot be referred to any described species of Zethus or 

 Labus, with which genus or sub-genus it agrees better than it does with 



