18 D. S. FLETCHER 



Ascotis terebraria (Guenee), the only other species known from the island of 

 Reunion with which acaciaria might be confused, differs externally in the antennae 

 of both sexes, there being two pairs of pectinations instead of one pair to each 

 pectinate segment in the male ; in the female there are two pairs of short bristles 

 instead of one pair to each segment. In both sexes the genitalia are diagnostic. 



Acaciaria has been recorded widely in the literature from other parts of the 

 Mascarene region, from continental Africa and from the Indo-Australian region ; 

 these records are based on misidentifications, for acaciaria is endemic on the island 

 of Reunion. 



The type, which should have passed to Oberthur with the rest of the Boisduval 

 collection, cannot be found either in the British Museum (Natural History) or in the 

 National Museum in Paris. Boisduval's illustration is, however, adequate for 

 identification. 



Distribution (Map i). Island of Reunion. 



Material examined. Reunion : (Dr. Roussel), 4 <$, 3 $ ; ibid. (Maillard), 1 $ ; 

 ibid., 21-30.V.1922 (G. F. Leigh), 3 c?> 4 ?• 



Cleora transversaria (Pagenstecher) comb. n. 

 (Text-figs. 7-9 ; PI. 1, figs. 152-165 ; Map 1) 



Boarmia transversaria Pagenstecher, 1907 : 97, pi. 6 : 4. 



<J. Genitalia (Text-figs. 7, 8). Arm of sacculus curved through 90° towards dorsal margin 

 of valve, then ventrad and again towards dorsal margin, the greater part covered by a setose, 

 membranous fold from ventral margin of valve ; apex of arm bluntly tapered ; a small, setose 

 process at base of arm ; apex of aedeagus narrowed and rounded ; vesica with two tapered 

 cornuti, one with a curved apex and two-fifths as long, the other straight and one-third as long 

 as aedeagus. 



$. Genitalia (Text-fig. 9). Lamella postvaginalis weakly sclerotized and shaped as in 

 figure ; bursa copulatrix pyriform, posterior two-thirds ribbed and lightly sclerotized, anterior 

 third membranous. 



Measurements. o* 29-5-35 mm. ; $ 33~37 mm. 



Closely related to acaciaria and to the following two species, betularia and 

 flavivenata, and sharing with acaciaria and betularia a remarkably wide and similar 

 polymorphism, examples of which are illustrated on PI. 1. Figs. 152 and 160 

 illustrate a male and a female of the form most commonly represented in collections. 

 In the male the tilleul buff ground colour of the wings is irrorate with drab and 

 fuscous, more densely proximad of the medial fascia on the fore wing and distad 

 of the postmedial fascia on each wing ; distad of the postmedial fascia on each wing 

 there is an irregular band of cinnamon buff to cinnamon brown. The female differs 

 in having the ground colour of the wings white. Figs. 154 and 158 represent a form 

 similar to the preceding, but with wholly black discal spots. Figs. 157, 161 and 

 162 represent a form in which the fuscous black medial fascia is strongly developed 

 on each wing and from which a lateral streak extends distally in the discal fold of 

 the fore wing. Figs. 153 and 159 represent a form in which the medial area of each 



