52 Annals of the South African Museum. 



the antennae, black ; wings dark fuscous, the costa and stigma, 

 except at the apex, orange. Palpi yellowish testaceous. ? . 



Length 12 mm. ; terebra 5 mm. 



Transvaal. 



Antennae longer than the body ; the scape more than twice longer 

 than wide. Face thickly covered with white hair. Tips of man- 

 dibles black. Dorsal surface of abdomen strongly, longitudinally 

 striated from the first to the sixth segments ; the centre of the 

 second segment is roundly raised at the base ; the sides ax'e 

 depressed, the depressions not forming a furrow ; the transverse 

 furrows are wide, deep, and clearly defined ; the oblique apical 

 furrow on the third is wide, deep, longish. The abdomen is not 

 much longer than the thorax and is distinctly wider than it ; 

 there are no transverse furrows on the apices of the segments, 

 they all, except the sixth, being striated to the end. Wings 

 large ; uniformly coloured, except for the usual hyaline cloud in 

 the first cubital cellule and along the outer edge of the recurrent 

 nervure. 



The breast is irregularly marked with black. 



What I make out to be I. coccincus, Be., has broad red eye orbits as 

 in the present species ; it is a much more slenderly built species and 

 has the fourth and following abdominal segments smooth. I. pictus, 

 B6., has a naiTower and longer abdomen ; the eye orbits have only 

 a narrow interrupted red line, and the apices of the abdominal seg- 

 ments have narrow but distinct transverse furrows ; the basal furrows 

 are not so deep and the upper outer orbits are broadly black. The 

 colour of the present species is different from what it is in the others ; 

 it is not vermilion bright red, but duller, more red-brick coloured ; 

 the ovipositor, too, is longer — as long as the abdomen, fully longer 

 than in varitinctis or ichitcL 



The Grodp of Tphiaulax calvinia. 



Yellowish or rufous testaceous, the head more or less and the hind tibise and 

 tarsi black ; wings fuscous, the basal half of the stigma yellowish ochraceous. 

 Thorax long, the mesonotum and scutellum Hat, the latter not much raised 

 above the former ; the parapsidal furrows obsolete ; metanotum fiat, longish, 

 not sloped at the apex, which is on a level with the base of the abdomen. 

 Abdomen closely striated, the furrows not deep ; a distinct oblique one on the 

 sides of the second, it reaching to the apex or to the middle only. 



This group shows an approach to the genus Platijhracon, as is 

 shown by the flat thorax and by there being a transverse keel or 

 ridge below the antennae. 



