84 D. S. FLETCHER 



The species is distinguished externally from both rothkirchi insulamm and 

 transversaria, the other species of Cleora occurring in the Comoro Islands, by its 

 larger size ; in the male the much sparser brown irroration gives angitstivalvis a 

 grey appearance by comparison with males of transversaria and in the female the 

 pattern of both upper and under surfaces of the wings distinguishes angustivalvis. 



Structurally the cucullus and the development of the sacculus in the male 

 genitalia and the form of the sterigma and bursa copulatrix in the female genitalia 

 are diagnostic. 



Distribution (Map 5). Comoro Islands ; probably endemic. 



Material examined. Holotype £. Grande Comore, 1884 (L. Humblot). 



Paratypes : Grande Comore, 2 <$, 11 $ ; ibid., 1894 (L. Humblot), 6 $ ; Grande 

 Comoro, viii.1911 (G. F. Leigh), 1 $. 



Cleora serena sp. n. 



(Text-figs. 111-113 ; PI. 11, figs. 337-340 ; Map 5) 



o". Vestiture white, lightly irrorate with drab and bister, except for first abdominal segment 

 which is immaculate ; patagia lightly edged with bister. Wings white, irrorate with drab and 

 bister and patterned with bister ; a broken snuff brown band, marked with light buff on veins, 

 situate immediately distad of postmedial fascia on each wing ; proximal half of subterminal 

 fascia on each wing irrorate with pale smoke grey (PI. 11, fig. 337). Underside white, patterned 

 with fuscous (PI. 11, fig. 338). 



o*. Genitalia (Text-figs. 112, 113). Uncus with short, thorn-like tip ; scobinate medial plate 

 of gnathus semi-circular, little broader than uncus ; juxta broadly Y-shaped at apex ; projec- 

 tion from apex of sacculus minute ; a slightly larger, setose, digitate process at mid-valve, 

 sometimes asymmetrical and bilobate on one side ; vesica with two short, tapered cornuti 

 fused at base ; one one-half as long and one two-fifths as long as aedeagus. 



$. Similar to male, but drab and bister irroration much reduced, allowing a sharper defini- 

 tion of pattern, especially of the broad, snuff brown band marked with light buff on the veins, 

 situate just distad of the postmedial fascia on the upperside of each wing ; pale smoke grey 

 irroration on subterminal fascia well defined and extending to termen in discal area on fore wing 

 and in distal half of hind wing (PI. 11, figs. 339, 340). 



$. Genitalia (Text-fig. 111). Lamella postvaginalis bell-shaped ; lamella antevaginalis 

 consisting of a strongly sclerotized lateral band ; colliculum of even width, twice as long as 

 broad ; anterior two-ninths of bursa copulatrix membranous and globular with a slight, bulbous 

 projection, remainder cylindrical, sclerotized and ribbed, the ribbing extending very weakly into 

 membranous part. 



Measurements. 6* 34-38 mm. ; $ 34-44 mm. 



The pattern of the type series is uniformly marked, similar to that of angustivalvis 

 from the Comoro Islands, to which serena is also closely related in structure of the 

 genitalia of both sexes. Related closely also in these structures to rostella, with 

 which it is probably sympatric in Angola. Externally the broad snuff brown band 

 distad of the postmedial fascia on each wing, well defined in the female, is distinctive ; 

 structurally the development of the sacculus in the male genitalia and the sterigma 

 and colliculum in the female genitalia are diagnostic. 



Distribution (Map 5). Congo ; Angola. 



