Descriptions of New Sjjecies of Parasitic Hymenoptera. 49 



of the second abdominal segment not much widened on outer side, 

 where they are bordered by some stout striae which extend from the 

 iirea to the outer edge, without a furrow between. 



This species is closely related to /. rUodesianus ; the two may be 

 separated thus : — 



The black mark on the vertex not narrowed behind, that on 

 occiput wide above ; lateral area on base of second abdomi- 

 nal segment triangular, gradually widened from the inner to 

 the outer side ; suturiform articulation bifurcating at the side, 

 the two branches enclosing a triangular raised area ; labial 



palpi testaceous rlwdesiaims. 



The black mark on the vertex narrowed behind, on the 

 occiput narrowed above ; lateral area on base of second 

 abdominal segment not much dilated on the outer side, not 

 triangular ; suturiform articulation not distinctly bifurcating at 

 the sides ; the basal branch smooth, indistinct, the raised area 

 not very clearly defined ; labial palpi black varipalpts. 



The middle segments of the abdomen are blackish. 



What I make out to be I. coccincits, Be., has similarly coloured 

 palpi and body colouration ; it has the mark on the vertex somewhat 

 narrowed behind but not to a point, that on the occiput is not 

 narrowed above ; the smooth, lateral raised area on the sides of the 

 second segment is more gradually, distinctly widened from the inner 

 to the outer side, the centre of the first abdominal segment has only 

 four keels of equal strength ; there not being a longer and stouter 

 central keel as in I. varipalpis. 



■'- Iphiaulax tanyceras, sp. nov. 



Bright vermilion-red ; the antennae, head, greater part of meso- 

 notum, mesosternum, hinder part of mesopleurae black ; wings dark 

 fuscous, the costa and stigma red. Antennae long, almost twice the 

 length of the body ; the scape twice longer than wide, covered below 

 with pale hairs. Basal two segments of abdomen strongly, irregularly 

 striated; the third closely, irregularly reticulated ; the fourth and fifth 

 irregularly, closely rugose ; the furrows wide, deep, crenulated ; the 

 lateral angles on the second and fourth smooth, shining ; there are 

 deep, crenulated furrows on the apices of the third and fourth ; the 

 sides of the fifth are broadly roundly dilated. There is a distinct, 

 striated keel on the basal half of the second segment ; it becomes 

 gradually narrowed towards the apex. Malar space and parapsidal 

 furrows red. Hind tarsi blackish. <? . 



Length 10 mm. 



Cape. 



4 



