54 Annals of the South African Muscuvi. 



black, covered with white hair. The striation on the abdomen is 

 sharp and strong on the basal segments, becoming weaker towards 

 the apical. Suturiform articulation deep, crenulated ; its lateral 

 furrows wide, shallow, striated ; the furrow on the base of the fourth 

 segment is deep, crenulated, and does not reach to the sides. Palpi 

 dark fuscous. Oral region, malar space and mandibles, except at the 

 apex, red. 



The Group of I. rhodoiianus, Cam. 



Yellowish testaceous, the abdomen slightly spotted with red ; the upper part 

 of the head for the greater part black. Abdomen short, ovate, the basal seg- 

 ment with a keel in the middle of the apex ; the second and the transverse 

 furrows striated ; the apical and basal furrows are distinct, crenulated ; there 

 is no distinct area on the base of the second segment. Wings fuscous hyaline, 

 the costa and stigma pale yellow, the nervures darker coloured. 



Apart from the difference in colour — the body, costa and stigma 

 pale yellow, instead of vermilion-red — this group does not differ 

 from that of Coccineus. 



Iphl\ulax khodesianus, sp. nov. 



Dark yellow, tinged with rufous, the antennae, the middle of the 

 front broadly and of the vertex still more broadly, black ; wings 

 hyaline, suffused with yellow at the basal half, with fuscous at the 

 a.pex ; the costa and stigma pale yellow ; the nervures darker. 2 . 



Length 8 mm.; terebra 3 mm. 



Southern Khodesia. Sebakwe. 



In fresh specimens the colour may be testaceous. Head and 

 thorax smooth ; the face covered w^ith black hair. Tips of mandibles 

 l)lack. Palpi pale testaceous. Malar furrow wide. Abdomen ovate, 

 as long as the thorax. First abdominal segment smooth ; the lateral 

 depression wide ; the raised central part keeled down the middle ; 

 the second segment closely, strongly longitudinally striated ; the 

 lateral plate wider than long, smooth, transverse at the base, irre- 

 gularly rounded at the apex ; the raised part, outside it and the 

 depressions smooth. Suturiform articulation wide, deep, stoutly 

 striated ; the apical lateral branch narrow, crenulated ; there is a 

 narrow, transverse, crenulated furrow on the apex of the segment ; 

 there is a distinct crenulated fuiTow on the base of the fourth seg- 

 ment and a naiTower, obscurely crenulated one on the apices of the 

 fourth and fifth. The apex of the third is aciculated-striated ; the 

 other segments are smooth. The recurrent nervure is interstitial. 



