1908.] 227 



The main point of difference between the two forms is to be 

 found in the width of the first fascia. In the species usually accepted 

 as reversana this is narrow, slightly curved, and of a dark colour, 

 whereas in the true reversana it is distinctly wider, usually straighter 

 and more uniform in width up to the middle of the cell, and of a 

 paler olivaceous hue, the ground-colour of the forewings moreover is, 

 although slightly greyish white, much less sprinkled and clouded with 

 grey-brown scales ; the cilia of the true reversana have a yellowish 

 tinge, those of the more clouded northern form are white, with slight 

 sprinkling of brownish grey. 



The average size of the southern specimens {reversana) is cer- 

 tainly greater, reaching to 17 mm., but occasionally they do not exceed 

 13 mm. I have seen none which can in any way be regarded as 

 intermediate between the one and the other, and have no hesitation 

 in suggesting the neonym Yersana for ~*reversana, Seebold (Stgr. 

 & Bang-Haas), nee Stgr., And., 1859. 



1762 : I. — Phalonia versana, sp. n. 

 = Conchylis *reversana, Seebold Deutsche Ent. Zts. Iris XI. 304 

 (1898) > ; Stgr-Rbl. Cat. Lp. Pal. II. 99, No. 1762 (1901) 2 [partim, 

 i. e. " Bilb." ; nee Stgr., " And.", 1859]. 



Antennae fawn-white. Palpi white, shaded with fawn-brown on their outer 

 sides. Head and Thorax white, the latter with a slight fawn-brown shade across 

 the middle. Forewings white, mottled with pale fawn-brown, and with a strong 

 darker brown dorsal streak rising before the middle, and a triangular dorsal spot of 

 the same before the tornus ; there is also a small spot of these darker scales beyond 

 the lower angle of the cell, and a few more in a short streak at the base below the 

 costa ; the paler fawn-brown mottling is evenly distributed, showing margins of 

 the white ground-colour between the patches, of which the two most conspicuous 

 are one on the middle of the costa, above the apex of the dorsal streak, and another, 

 rather larger, half-way between this and the apex, a sinuate shade connecting it to 

 the lower end of the termen, and, with some interruption, also to the middle of the 

 dorsum ; the brown dorsal streak is somewhat pinched-in below the fold, thence 

 extending obliquely outward, expanding on the fold and above it, its termination 

 not very clearly defined at about half the width of the cell ; cilia white, mottled 

 with pale fawn-brownish, the termen also shaded with the same. Exp. al. 

 13 — 14 mm. Hindioings brownish grey ; cilia sinning, silvery whitish. Abdomen 

 brownish grey. Legs fawn-whitish. 



type, c? (5092) ; $ (5093). Mus. Wlsui. 



Hah. : NE. SPAIN— Bilbao, V 1 --'. W. FRANCE— Landes— 

 Dax, Larva Helichrysum, excl. 20. VI. 1876 {Ryt.) : Moebihan — 

 Plouharnel, 25.V— 24.VI {Bgt., Rfm.) : FRANCE {Stgr.). Fifteen 

 specimens. 



