34 D. S. FLETCHER 



This and the second Mascarene species in the minimaria-group, Z. griveaudi 

 sp. n., are distinguished from the externally similar anacantha, to which they are 

 probably most closely related, by the presence of the longitudinal, setose ridge 

 on the valve in the male genitalia and by the absence of a signum from the corpus 

 bursae in the female genitalia. In aureomarginata the form of the uncus, the 

 length of the dorsal margin of the valve and the form of its dorsal process and the 

 length of the fulcrum in the male genitalia and the form of the sterigma in the 

 female genitalia are diagnostic. 



Distribution. S. Madagascar. 



Material examined. 



Zamarada aureomarginata Pagenstecher, holotype $ (without abdomen), Mada- 

 gascar: S.W., Tulear (Voeltzkow), in MNHU, Berlin. 



Madagascar: S.W., Tulear, 30.vii.1929 (E. I. White), 1 <j>; La Table, 29.viii.1929 

 (E. I. White), 1 $ (both BMNH); sud, cordon littoral Mahafaly, env. d'Efoetsy, 

 10 m, 30.xi-3.xii.1967 (P. Griveaud), 2 <$, 2 $; lac Tsimananpetsotsa, 4-5. viii. 1967 

 (P. Griveaud), 7 <$, 2 $; Ambovombe, 29.1.1932 (R. Decary), 1 $ (all MNHN, Paris). 



Zamarada griveaudi sp. n. 



(Text-figs 27, 28; PL 5, figs 471, 472) 



(J genitalia (Text-figs 27, 28). Uncus tapered, apex produced and curved ventrad; base 

 with long setae dorsally. Ventral plate of gnathus sclerotized, tip narrowly rounded. 

 Valve with longitudinal setose ridge parallel with dorsal margin of valve, which is one-half 

 as long as aedeagus; dorsal process slightly dilate and curved at one-half. Aedeagus tapered; 

 sclerotized core of fulcrum shorter than aedeagus, tip curved dorsad through 180 degrees and 

 coarsely spined. Vesica with a cluster of short spines. 



$ genitalia (PI. 5, figs 471, 472). Lamella antevaginalis crescent-shaped. Anterior third 

 of corpus bursae membranous, remainder ribbed and sclerotized; no signum. 



Measurements. Fore wing: $ o-iomm; $ io-o-io-5 mm. Antennal pectinations: 

 ^ 12 X, $ 4 X diameter of shaft. 



Externally closely similar to aureomarginata, with which it occurs. Distinguished 

 in the male genitalia by the narrower uncus, the longer, more slender valve and the 

 form of its dorsal process, dilate at one-half, and the shorter fulcrum; distinguished 

 in the female genitalia by the crescent-shaped lamella antevaginalis. The dis- 

 tinguishing characters of the uncus in the male and of the lamella antevaginalis 

 in the female can be seen without dissection. 



Distribution. S. Madagascar. 



Holotype (J, Madagascar: sud, lac Tsimananpetsotsa, 4-5 .viii. 1967 (P. Griveaud), 

 in MNHN, Paris. 



Paratypes. Madagascar: holotype data, 6 <$, 3 $; sud, cordon littoral Mahafaly, 

 env. d'Efoetsy, 10 m, 30.xi-3.xii. 1967 (P. Griveaud), 2 $; sud, Env. Efoetsy, 8 m, 

 30.xi-3.xii.1967 (P. Griveaud), 2 $; sud, Andranomanoetse-Be, aven du Plateau, 



