REVISION OF GENUS ZA MA RA DA 175 



Measurements. Fore wing: ^^ 12-13 mm. Antennal pectinations: £ 15 x,$4 X diameter 

 of shaft. 



Externally (PI. 112, fig. 1011) closely similar to fessa. Antennal pectinations 

 slightly longer in the female, but this character may prove inconstant when 

 further material is available for study. In the male genitalia the form of the valve 

 with the boldly rounded and dorsally setose apex of the dorsal margin, extending 

 posteriorly almost to the level of the acicular apex of the ventral margin, is 

 diagnostic. 



Distribution. Tanzania, Zaire. 



Material examined. 



Zamarada enter pina Oberthur, holotype <$, Zaire: Tanganyika [W. shore of 

 lake], region M'Pala (R. P. Guilleme), Geometridae genitalia slide no. 5918, in 

 BMNH. 



Tanzania: Kilosa, 16. i. 1922 (Loveridge), 1 $ (BMNH); Ilonga, Morogoro, 

 i-iii. 1965 (Mrs Chalmers), 1 <$ (NMK, Nairobi); Lindi, Ndanda, 300 m, 1-3.xii.1958 

 (Ch. Lindemann) , 1 <$, 1 $ (ZSBS, Munich). Zaire ('Belgian Congo'): Katanga, 

 Shinkolobwe, i.iv.1931, 1 $ (BMNH). 



Zamarada dorsiplaga Prout 

 (Text-figs 290, 291; PI. 61, figs 696, 697; PL 112, fig. 1012) 



Zamarada dorsiplaga Prout, 1922a : 362. Holotype $, Rhodesia (BMNH) [examined]. 

 [Zamarada fessa Prout sensu Janse, 1932 : 135, pi. i, fig. 29, text-fig. 39. Misidentification.] 



$ $ (PI- 112, fig. 1012). Externally closely similar to fessa and to euterpina, with which 

 latter species it occurs in Katanga; hyaline area of wings usually more densely irrorate with 

 dark grey to black; costa of fore wing light buff to light grey irrorate with dark grey to black; 

 dentate subterminal fascia often heavily marked with dark grey to black, rarely tinged with 

 brownish orange. Distinguished in the male by the shorter antennal pectinations. 



<£ genitalia (Text-figs 290, 291). Distinguished from closely similar fessa by the form of 

 the valve; the series of longitudinal, sclerotized ridges on the ventral surface in the apical 

 fourth extend for more than one-half of the distance from the ventral to the dorsal margins, 

 with a strongly sclerotized ridge situate medially; the dorsal process is more slender and more 

 finely tapered than in fessa. 



$ genitalia (PI. 61, figs 696, 697). Appears closely similar to those of fessa, but distinguished 

 from euterpina by the form of the lobes on the sterigma. 



Measurements. Fore wing: $ 12'5-15-omm; 9 i2-5-i6-omm. Antennal pectinations: 

 (J 12 X , $ 4 X diameter of shaft. 



Distribution. Rhodesia, Zambia, Zaire. 



Material examined. 



Zamarada dorsiplaga Prout, holotype $, Rhodesia: Salisbury, i.viii.1918 

 (J. O'Neil), Geometridae genitalia slide no. 7466, in BMNH. 



Rhodesia: Salisbury, v, vii, x (/. O'Neil), 4 <$, 1 $ (BMNH); Salisbury, ill, x, 1 <$ 

 (BMNH), 2 <J (NMR, Bulawayo); Shamva, xii. 1920 (/. O'Neil), 1 <$ (BMNH); 



