REVISION OF GENUS ZAMARADA 55 



at angle of 60—90 degrees to the serrate medial third in torrida, but at a much more acute 

 angle in tosta; the serrate edge of the left-hand process, angled in torrida, is usually shallowly 

 excavate in tosta. 



§ genitalia (PI. 14, figs 507, 508). Differ from torrida in the markedly reduced sclerotization 

 of the corpus bursae, confined in tosta to the posterior tenth, and in the absence of the con- 

 spicuous obtuse angle at the right side, characteristic of that species. 



Measurements. Fore wing: g 10-12 mm; Q. n - 5-i3-omm. Antennal pectinations: <J 

 12 X , 9 3-4 X diameter of shaft. 



Closely related to, perhaps a subspecies of torrida; differing externally in its larger 

 size and darker wing pattern and structurally in the genitalia as noted above. 



Distribution. South West Africa. 



Holotype $ South West Africa: Rehoboth Distr., 7-17.V.1965 (J. H. Potgieter), 

 in TM, Pretoria. 



Paratypes. South West Africa: Bullspoort, iv. 1949 (R. G. Strey), 2 $; ibidem, 

 vi. 1949, 1 S, vii. 1949, 1 o; holotype data, 6 <$, 15 $ (all TM, Pretoria); Okahandja, 

 3-16.ii.1928 (R. E. Turner), 1^,1$; ibidem, 24.ii-1.iii.1928, 1 $; 12-18.xii.1927, 

 1 (J; Okahandja, ii. 1935 (F. Gaerdes), 1 £; Sissekab, N.W. of Otavi, 1300 m, 

 11.xi.1933 (Dr K.Jordan), 1 <$ (all BMNH); Abachaus [Otjiwarongo Distr.], viii. 1942 

 (G. Meyer), 1 $ (TM, Pretoria). 



Zamarada delta sp. n. 



(Text-figs 63, 64; PI. 13, figs 503, 504; PI. 98, fig. 876) 



<$ 9 (PI- 98. fig- 876). Hyaline area of each wing yellowish white sparsely irrorate with 

 brownish grey; costa of fore wing yellowish white to light yellow, similarly irrorate; medial 

 fascia weakly marked and broken, light yellow; discal spots dark brown, minute. Non-hyaline 

 terminal area of each wing brownish grey (pi. 8, C2) paling to yellowish white terminad; post- 

 medial fascia, forming distal margin of hyaline area, dark brown edged proximally with light 

 yellow and distally with silvery grey ; subterminal fascia broken and irregular, brownish yellow 

 (pi. 5, C8). Underside of non-hyaline terminal area greyish yellow to buff varyingly suffused 

 with brownish orange to brown. 



<J genitalia (Text-figs 63, 64). Uncus tapered. Ventral plate of gnathus broadly spatulate. 

 Dorsal process of valve with smooth-edged, triangular projection at one-half. Fulcrum nearly 

 twice as long as aedeagus, slender with finely scobinate tip. Ventral surface of aedeagus 

 sclerotized and tapered and scobinate apicad. 



$ genitalia (PI. 13, figs. 503, 504). Sterigma asymmetrical, as illustrated. 



Measurements. Fore wing: <J 10-5-12-5 mm; 9- 10-5-13-0 mm. Antennal pectinations: 

 $ 1 1 X , $ 9 X diameter of shaft. 



Differs from the externally rather similar chrysothyra and erugata in the brownish 

 grey, almost pinkish grey, colour of the wings and in the minute discal spots. Males 

 differ from erugata in the presence of a dilate hind tibia enclosing a pencil of long 

 hair scales and from both erugata and chrysothyra in the genitalia; distinguished 

 from the rather similar genitalia of erugata by the sharply angled apex of the 

 triangular projection from the dorsal process of the valve and by the appreciably 



