166 D. S. FLETCHER 



District, Gauca, 20 miles E. of Rio Quanza, 3650 ft, 4.1.1931 (R. & L. Boulton), 

 1 <J (CM, Pittsburgh). 



Zamarada gracilata sp. n. 



(Text-figs 275, 276; PI. 57, figs 680, 681; PL 111, fig. 1005) 



(^^(Pl. in, fig. 1005). Externally closely similar to specimens of the darker, greyer nominate 

 form of flavicaput, with which it occurs at Abercorn in Zambia. On average a little shorter 

 in wing length; the non-hyaline terminal area of the wings is a darker shade of brown (pi. 6, 

 E5-6, cocoa-brown) with the weakly defined, dentate subterminal fascia of a redder brown 

 (pi. 7, E6-7). 



In the female the antennal pectinations are a little longer than in flavicaput, being six times 

 instead of three times as long as the diameter of the shaft. 



<J genitalia (Text-figs 275, 276). Uncus similar to that of flavicaput. Ventral plate of 

 gnathus well developed, tip rounded. Valves asymmetrical, similar to those of flavicaput 

 but with a short, setose projection at the base of each dorsal margin; dorsal process shorter 

 and stouter than in flavicaput and lacking the semi-circular, setose dilation in basal half. 

 The aedeagus differs from that of flavicaput in the finely tapered, not rounded apex and in 

 the more slender and finely scobinate apical part of the fulcrum. 



§ genitalia (PI. 57, figs 680, 681). Differ from flavicaput in the presence of a shallow, 

 posteriorly rounded lamella antevaginalis and an appreciably shorter and broader ductus 

 bursae, lacking a process at the posterior margin. 



Measurements. Fore wing: <J 13-5 mm; 9 I 3'° _I 3'5 mm. Antennal pectinations: 

 cJ 11 X, $ 6 X diameter of shaft. 



Distribution. Zambia, Angola. 



Holotype <3\ Zambia: Abercorn, i. 1966 (I.R.L.C.S.), Geometridae genitalia 

 slide no. 7376, in BMNH. 



Paratypes. Zambia: Abercorn, i. 1966 (I.R.L.C.S.), 1 $ (BMNH); Abercorn, 

 ii-iii. 1954 (D. Vesey- Fitzgerald), 1 <$, 2 $ (NMK, Nairobi); Abercorn, 13.1.1963, 

 1 (J; ibidem, ii. 1955, 1 (J; xii. 1963, 1 $ (all NMR, Bulawayo). 



A short series of eight specimens from Angola is tentatively associated with 

 gracilata, but excluded from the type-series, because of minor modifications in 

 the sclerotization of the posterior fourth of the corpus bursae in the female genitalia. 



Angola: Bihe (Pemberton), 1^,1$; N. Bailundu, ix. 1901 (Pemberton), 6 $ 

 (all BMNH). 



The EUPHROSYNE-Grovp 



Similar to the scintillans-gvoup in having asymmetrical valves and in the left 

 valve having a dense, transverse band of long setae on the dorsal surface apicad. 

 Uncus beU-shaped with a short, tapered, strongly sclerotized, beak-like tip and a 

 pair of lateral membranous and setose lobes. Ventral plate of gnathus developed. 

 Apical fourth of aedeagus with a semi-circular, blade-like projection. Fulcrum 

 simple, one-half or less than one-half as long as aedeagus. Vesica with a cluster 

 of short, slender spines. The male hind tibia is simple. 



In the female genitalia the ductus seminalis is dilate and scobinate. 



