44 D. S. FLETCHER 



Ethiopia: Takusa, 6 miles S.W. of Lake Tana, 6000 ft, 7.XL1926 (R. E. 

 Cheeseman), 1 9 (BMNH). 



Zamarada amicta Prout 

 (Text-figs 43, 44; PL 9, figs 485, 486; PL 97, fig. 864) 



Zamarada amicta Prout, 1915 : 344. LECTOTYPE £, Kenya (BMNH), here designated 

 [examined]. 



(J $ (PI. 97, ng. 864). Closely similar in some of its forms to chrysothyra ; hyaline area of wings 

 usually more densely irrorate with yellowish brown; yellowish brown medial fascia, curved 

 distad of discal spot, usually developed; discal spot on fore wing often less markedly dark- 

 ringed. Underside of non-hyaline terminal area less extensively dark brown than in chryso- 

 thyra, the dark shade often concentrated in apical area of each wing. 



(J genitalia (Text-figs 43, 44). Uncus laterally compressed and tapered apicad. Ventral 

 plate of gnathus as long as uncus, apex tapered to rounded tip, surface minutely scobinate. 

 Dorsal process of valve stout in basal half with triangular projection at one-half, the anterior 

 margin serrate, the posterior margin concave. Fulcrum seven-eighths as long as aedeagus, 

 the apex bearing three stout and four minute thorn-like spines. The form and the degree of 

 serration of the anterior margin of the triangular projection from the dorsal process of the valve 

 varies a little, but the concavity of its posterior margin is well defined in the six slides studied. 



9 genitalia (PI. 9, figs 485, 486). Sterigma asymmetrical, posterior margin with short, stout 

 digitate process medially, inclined anteriorly; projection from right side of posterior margin of 

 lamella postvaginalis markedly longer than that from left. Corpus bursae sclerotized at right 

 side posteriorly. 



Measurements. Fore wing: £ 10-5-12-0 mm; $ 12 mm. Antennal pectinations: ^ 12 X, 

 $ 1 -5 X diameter of shaft. 



Distinguished structurally from chrysothyra in the male by the blade-like apex 

 of the uncus, by the less heavily spined apex of the fulcrum and by the form of the 

 dorsal process of the valve, notably in its stouter basal half, the concave posterior 

 margin of its triangular projection and the absence of a short, setose, digitate 

 process from the base of its serrate anterior margin. The female of chrysothyra 

 is not known. 



Distribution. W. Kenya, Uganda, Burundi, Zaire. 



Material examined. 



Zamarada amicta Prout, lectotype £ here designated, Kenya (Brit. E. Africa): 

 N. Kavirondo, Maramas Dist., Ilala, 4500 ft, 20.vi.1911 (S. A. Neave), 1912-92, 

 Zamarada amicta Prout type, Geometridae genitalia slide no. 5900, in BMNH. 



Kenya: Kibwezi, v. i960 (R. H. Carcasson), 1 $ (NMK, Nairobi); Mt Elgon, 

 xi. 1952 (T. H. E. Jackson), 1 $ (NMK, Nairobi); ibidem, xii, 1951, 1 $ (BMNH); 

 lectotype data, Geometridae genitalia slide no. 1949-139, 1 $ (paralectotype of 

 Zamarada amicta Prout) (BMNH); Malaba Forest, vi. 1957 (C. R. Howard), 1 q* 

 (NMK, Nairobi). Uganda: Kalinzu Forest, ii. 1950 (/. G. Williams), 1 <$; Mabera 

 Forest, viii. 1920 (R. A. Dummer), 2 <J; ibidem, Kyagive, Mulange, iv-viii, 1 £', 

 Mubende, v. 1956 (R. Carcasson), 2 $; Semliki Forest, 2850 ft, 22.viii-3.ix.1952 

 (D. S. Fletcher), 1 $ (all BMNH). Burundi: E. Rusisi Valley, N. Lake Tanganyika, 



