1891.] FROM SOUTH-WESTERN AFRICA. 91 



upper median portion of hind wing, conspicuously clouded with whitish . 

 Fore wing : silvery-white centres to discocellular and discal spots 

 large and bright ; lowest spot in discal series large and curved ; a 

 small black spot (as in Z.picrus, Cram.) immediately below sub- 

 basal discocellular spot. Hind wing : sub-metallic spots whiter 

 but not so bright as in Z. molomo, the outer discal series more remote 

 from the inner one and more regular ; last two spots of both outer 

 discal and hind-marginal series fuscous, outwardly bounded by 

 whitish. 



The variability and intimate alliance of the various forms of this 

 (the Thyra) section of Zeritis render a satisfactory discrimination 

 of them exceedingly difficult, but I tbink that the difference of size 

 and the peculiarities of marking above noted warrant the separation 

 of Z. damarensis as a distinct species. It should be observed that 

 the specimens described were taken at the same place and during 

 the same month as Z. molomo. 



Omaramba-Oamatako (January). Three male examples. 



Genus Erikssonia, n. g. 



Imago. — Head small, clothed with short down ; eyes smooth ; 

 antennae rather short, thick, very gradually incrassate from about 

 middle to tip (which is obtuse ) ; palpi long, horizontally porrect, 

 not convergent but apart throughout their length, laterally com- 

 pressed, clothed with short scales above and with long densely-packed 

 hair-like scales beneath, terminal joint long, acuminate, but not very 

 slender. 



Thorax venj short, slender, very sparsely clothed with scales and 

 hairs. Fore wing elongate, produced apically ; costa but slightly 

 arched at base, and thence almost straight to apex ; hind margiu 

 slightly convex between upper radial and 3rd median nervules ; 

 subcostal neuratiou like that of Zeritis, except that the 4th nervule 

 is shorter and terminates on costa just before apex ; discocellular 

 nervules almost vertically transverse, slightly curved, the lower 

 about twice as long as the upper one ; upper radial nervule united 

 to subcostal nervure at some distance beyond extremity of cell ; 

 discoidal cell short, less than half the length of wing. Hind wings 

 with costa very prominently convex at base, but thence only 

 moderately curved ; hind margin slightly sinuate (in female and in one 

 of the male specimens with a very slight subangular prominence at 

 extremity of 3rd median nervule) : at anal angle a short acute 

 projection ; costal nervure terminating at apex ; subcostal nervure 

 branching a little before extremity of cell ; discoidal cell very short ; 

 radial nervule starting from junction of discocellular nervules nearer 

 to 2nd subcostal than to 3rd median nervules. Zeys rather long and 

 stout, thickly clothed with scales ; tibiae very sparsely, tarsi closelv 

 spinulose beneath ; middle and hind tibice tvith very short terminal 

 spurs ; fore tibiae in male armed with a long straight terminal spur 

 outwardly and superiorly ; middle and hind tarsi with the first joint 

 longer than tibia (and in male as thick), and with the terminal claws 

 large and strong ; fore tarsi longer than tibia, in male more slender 



