44 Annals of the South African Museum. 



Basal five segments of abdomen strongly, sharply longitudinally 

 striated ; the furrows on the sides of first segment wide and smooth, 

 except at the base, where, on the inner side, there are some short 

 striae ; the centre has a stout keel, with some irregular transverse 

 keels on either side ; the second segment with a stout keel reaching 

 to the apex ; the base longish, triangularly dilated and longitudinally 

 striated ; the lateral depression somewhat pyriform ; the wide part 

 at the apex, which is rounded ; on the inner side it is bordered by a 

 stout curved keel ; it is almost smooth at the base, the rest irregu- 

 larly striated ; on the central part are two oblique keels running 

 from the inner side of the base to the apex, where there are, on the 

 inner side, two or three keels. Suturiform articulation wide, deep, 

 irregularly crenulated ; the following two furrows are wnde, stoutly, 

 irregularly crenulated. The second cubital cellule is about two and 

 a half times longer than wide ; the third abscissa of the radius is 

 slightly but distinctly longer than the following two united. Head 

 thickly, the thorax above sparsely covered with long black hair. 

 Face rugose, the face transversely striated. Palpi Ijlack. 



Thk Gkoup ok I. levissimiis. 

 Rufous ; the top of the head and marks on mesonotum black ; the win^s dark 

 fuscous ; the base and middle of both with hyaline clouds. Abdomen longish, 

 smooth, shining, impunctate ; the keel on second segment long, gradually 

 narrowed to a projecting point at the apex. There are no transverse furrows 

 on the third and fourth segments; but distinct oblique lateral ones at the base ; 

 the suturiform articulation and its lateral branch narrow, smooth. 



Iphiaulax levissimus, sp. nov. 



Dark rufo-testaceous ; the antennae, front, vertex, a line on the 

 middle lobe of mesonotum, narrowed towards the apex, twice longer 

 than the width at the base, a line on the lateral lobes, extending from 

 the base to the apex, an irregularly oval mark on the upper part of 

 the apex of the mesonotum, mesosternum and the apex of the hind 

 tibiae, black. Wings fuscous, the base to the stigma largely, the 

 first cubital cellule and a cloud in front of the recurrent nervure, 

 yellowish hyaline, the stigma to near the apex ochraceous. ? . 



Length 15 mm. ; terebra 11 mm. 



Cape Colony. Hex River ; Worcester Distr. Also in Col. Camei'on, 



Face strongly punctured, sparsely covered with longish black hair. 

 Malar furrow distinct. Palpi dark testaceous. Thorax smooth ; 

 the middle lobe of mesonotum not much raised ; it is flatter than the 

 scutellum. Median segment smooth. Abdomen with the furrows 

 smooth, neither punctured, nor striated ; the furrows on the basal 



