450 Annals of the South African Museum. 



hyaline with the nervures and nervules slightly rufescent brown, and 

 having on the fore wings a narrow brownish band extending along 

 the sub-costal and median nervures from the base to the pterostigma 

 which is large and sub-arcuate ; there is no tessellation proper in the 

 costal area, only a few indistinct spots on the base of the nervure, 

 from about the median part to the pterostigma ; in the hind wings 

 the rufescent brown band is as in the fore, but each nervule of the 

 costal area has from one-third of the base a more distinctly infuscate 

 patch close to the sub-marginal nervure, and the pterostigma is 

 slightly broader than in the anterior wings ; legs reddish-brown ; 

 antennae flavous with the four apical joints and the broadly pyriform 

 club fuscous brown. 



This species is easily distinguished from N. capcnsis by the more 

 hyaline wings, and also the markings of the abdomen ; it resembles 

 more N. collusor, but differs from it in the non-tessellated costal 

 area, the absence of a supra-apical infuscate patch in the hind wings 

 ( ? ) ; nor is the thorax variegated with yellow. 



Length of body 22 mm., of fore wings 31 mm., of hind wings 

 23 mm. 



Hah. Southern Ehodesia (Salisbury), G. A. K. Marshall. 



ENCYOPSIDIUS, n. gen. 



I propose this genus for a small, delicate species, of which I have 

 seen one example only, and which in many characters resemble 

 Encyopsis. The eyes are divided in the same manner, but are not 

 in proportion quite as large ; the shape and neuration of the wings 

 are identical, and that of the clasps of the J very similar, but the 

 antennae are much shorter, and the hind tibiae have no apical spurs. 



Encyopsidius promontorii, n. sp. 

 Plate IX., fig. 11. 



(? . Head densely clothed with very long hairs greyish in front, 

 fuscous at the apex ; antennae only two-thirds the length of the fore 

 wings, flavescent, the club slightly fuscous ; prothorax fuscous, 

 clothed on the pronotum with fuscous and on the sides of the meso- 

 notum with a fringe of white hairs, abdomen fuscous brown, clasps 

 very short, flavescent ; wings only moderately long, fore wings 

 lacteous hyaline with the very base, the nervures, and the small 

 pterostigma flavescent, the nervures slightly fuscous ; hind wings 

 plainly shorter than the anterior with the three anterior nervures, 

 and the greatest part of the area flavescent, but the median part is 



