164 TORTR1CINA. 



dispersed over the surface. Apical scales and cilia white. Posterior 

 wings glossy, grey at the base, becoming fuscous towards the margins. 

 Cilia yellowish. Abdomen grey, the apex drab. 



In general appearance this species is like O. scabrana, but is 

 distinguishable by its smaller size, whiter anterior wings, and 

 the colour of the spots (these latter vary in intensity) ; the tufts 

 and ridges are less numerous, and not so developed. Some- 

 times the anterior wings are suffused with an ochreous tinge, as 

 figured in Wood's ' Ind. Ent.' PL 36, f. 1096, which we consider 

 as the Tortriiv Cerusana of Hub., Haw., &c. 



The imago appears among Elms in July, is very rare and local 

 in England. It occurs at Darenth, near Dover, New Forest, 

 Bridlington, Exeter, and Worcester. Like the preceding, it is 

 common round Paris. 



The larva feeds on the Elm, uniting the leaves, and is full-fed 

 towards the middle of June. 



Genus III. PERONEA, CURTIS. 



Palpi twice as long as the head, remote, porrected upwards, 

 densely clothed with short scales, which envelope the apical joint ; 

 basal joint pyriform, stoutest at the apex, as long as the apical, 

 which is simple and cylindrical, its apex acute ; middle joint thrice 

 the length of the apical, arching upwards, and thickest in the middle. 

 Maxillae as long as the palpi. Thorax globose, trigonate behind. 

 Anterior wings : length exceeding twice the width, with tufts of 

 elevated scales disposed over their surface. Costa arched, obtusely at 

 the base and regularly at the apex, slightly concave in the middle. 

 Apex produced ; apical margin concave ; dorsal margin nearly 

 straight. The discoidal cell is situated in the middle of the wing, 

 and extends scarcely two-thirds its length. The costal vein attains 

 the costa before the middle. Posterior wings obovate ; apex acute ; 

 apical and dorsal margins slightly concave ; basal angle produced. 

 Abdomen stout in the $ , tufted at the apex in the $ . 



This is a beautiful and most variable genus, in some of the 

 species (cristana, Hastiana] excessively so ; none of them of very 

 common appearance, occurring mostly in the late summer and 

 autumnal months, sometimes hybernating. The $ frequently 

 smaller than the d 



The larvse of many of the species are unknown, but those 

 which are, are tolerably active, of greenish-yellow colour, very 

 diaphanous, and the outer skin overlapping considerably at the 

 junctures of the segments when the body is contracted. 



