126 D. S. FLETCHER 



Paratypes. Gabon: Rives de la Karagoua au N. de Mwadi, 24.V.1963 

 (G. Bernardi), 1 <$; Makokou, 18.xi.1967 (G. Bernardi), 1 $ (both MBG, Paris). 



The XYSTRA -Group 



Characterized in the male genitalia by the form of the valve, which is finely 

 tapered to an acicular apex and which has a short spine-like projection from 

 mid-dorsal margin and by the broad, deep and coarsely spined fultura superior. 

 The form of the female genitalia with a digitate process extending anteriorly from 

 the sterigma and the sclerotization of the posterior part of the corpus bursae 

 suggest an affinity with the excavata-gvoup. 



Key to Species 



1 Dorsal surface of uncus with a longitudinal, keel-like ridge. Aedeagus with 



digitate projection from two-thirds. Fulcrum dilate and spatulate at 

 apex; apex truncate ........ similis (p. 127, 



- Dorsal surface of uncus evenly curved. Aedeagus with thorn-like projection 



from three-fourths. Fulcrum scobinate in apical half, apex acicular 



xystra (p. 126) 



Zamarada xystra sp. n. 



(Text-figs 211, 212; PI. 43, figs 623, 624; PL 107, fig. 962) 



$ § (PI. 107, fig. 962). Hyaline area of wings tinged with greyish yellow, striate with 

 brown, densely along posterior margin of each wing, sparsely elsewhere, and finely edged 

 distally with dark brown, then silvery grey; costa of fore wing buff, striate with grey; 

 discal spots black, that of fore wing large and silvery grey at centre. Non-hyaline terminal 

 area light brown (pi. 6, D5, sunburn-D6, cinnamon) densely irrorate with a darker shade 

 (pi. 6, E6, cocoa-brown-E7) ; dentate subterminal fascia a darker shade of brown finely edged 

 distally with silvery grey. Underside of non-hyaline terminal area uniformly greyish 

 brown. 



In the male all femora are fringed with long, light brown hair-scales; the hind tibia is grey, 

 grossly dilate and encloses a dense tuft of short, grey hair-scales. 



^ genitalia (Text-figs 211, 212). Uncus bulbous, apical half tapered and curved ventrad. 

 Valve finely tapered to acicular apex; a spine-like projection at mid-dorsal margin, a projection 

 that may consist of one, two or three short spines; in some examples the projection is present 

 on one valve only; dorsal process setose at one-third, but without pronounced projection; 

 hair-scales of coremata buff. Aedeagus strongly sclerotized and tapered apicad with a 

 thorn-like projection at three-fourths. Fulcrum strongly sclerotized and finely tapered 

 with some scobination below tip. Vesica with a minute, thorn-like cornutus. 



^ genitalia (PI. 43, figs 623, 624). Posterior margin of lamella antevaginalis bilobate; a 

 hollow digitate process extends anteriorly from right side, which may perhaps accommodate 

 the fulcrum during copulation. Corpus bursae sclerotized and minutely scobinate 

 posteriorly. 



Measurements. Fore wing: $ i6'5-i7-o mm; § 15 mm. Antennal pectinations: q 8 X, 

 $ 5 X diameter of shaft. 



Distinct externally in colour and pattern. Distinguished from the following 

 species, similis, by the darker brown colour of the non-hyaline terminal area, 



