Descriptions of Ne7v Species of Parasitic Hymenoptera. 57 



furrow on the tifth is curled up ; the furrow on the sides of the 

 second segment is deep, of equal width, and reaches to the base of 

 the apical third of the segment. 



The wings are larger and longer than usual. 



The Group of I. rohustuss. 



Luteous, the hind tibiae and tarsi black ; wings fuscous, the base yellowish 

 hyaline, the dark apical part with hyaline clouds ; the basal four or five seg- 

 ments of the abdomen closely, finely striated ; there is no distinct area on the 

 base of the second segment ; the lateral furrows distinct, crenulated. The 

 abdomen is longish, distinctly longer than the head and thorax united. 



This group shows an approach to the Exothccini, the transverse 

 median nervure being received shortly beyond the transverse basal. 

 In coloration also they approach the species of ExotJiecus from 

 South Africa. Our two species may be separated thus : — 



Head black, the fifth abdominal segment punctured, ovipositor longer 



than the abdomen robiistus. 



Head luteous, the fifth abdominal segment impunctate ; ovipositor 



shorter than the abdomen mimeticus. 



Iphiaulax ? ROBUSTUS, sp. nov. 



Luteous, the antennae, head, except the oral region, and the hind 

 tibiae and tarsi black ; wings yellowish hyaline to the transverse 

 basal and transverse median nervures ; dark fuscous beyond, with a 

 hyaline cloud in the first cubital cellule, a small one below the first 

 transverse cubital nervure, one on either side of the second trans- 

 verse cubital, extending below into the discoidal as an irregular, 

 somewhat pyriform, slightly oblique cloud. 2 . 



Length 17 mm. ; terebra 13 mm. 



Natal. Durban. 



Antennal scape about twice longer than the width at the apex, 

 covered with longish black hair below. First abdominal segment 

 with a distinct furrow down the centre ; the apex smooth, with a 

 strongly striated band behind the smooth part ; the second and third 

 segments are strongly closely striated, except on the basal lateral 

 areas ; the fourth and fifth are smooth at the base behind the furrows, 

 the rest closely striated ; the suturiform articulation deep, with a 

 longish lateral branch ; there are wide crenulated furrows on the 

 base and apex of the following two segments, and on the base of the 

 sixth. Apical abscissa of radius as long as the second and one-fourth 

 of the first ; the second cubital cellule more than twice longer than 

 wide the recurrent nervure is received about one-third of the length 



