TORTRICINA. 81 



the middle, but is sometimes rounded. Beyond the basal patch the 

 costal half of the wing is clouded with fuscous, and from the centre 

 of the costa commences a broad fuscous, undefined fascia, which pro- 

 ceeds obliquely to the anal angle, before reaching which it encounters 

 a dark brown spot on its outer edge. The costa is maculated through- 

 out, but just before the central fascia, and beyond it, to the apex, the 

 markings assume the form of pale geminated streaks, with dusky 

 lines between, which are more or less produced towards the apical 

 margin. At the apex is a distinct eye-like spot of dull ferruginous. 

 The oeelloid patch is not clearly defined, of slightly shining grey 

 colour, irrorated with dusky atoms ; the pale portions of the wing 

 streaked transversely with brown, more or less intense in different 

 specimens. Apical scales (as well as the cilia) interrupted by a 

 pale streak running through them below the apical spots, umber- 

 brown, with drab bases. Cilia dark dusky brown, with drab bases, 

 merging into drab at the anal angle, and dusky or iron-grey beyond 

 it. Posterior wings pale fuscous, becoming darker at the margins. 

 Marginal scales fuscous, with drab bases. Cilia very pale drab, be- 

 coming pale grey at the anal angle. Abdomen fuscous ; the caudal 

 tuft dull drab. $ Exp. al. 6^-7 lin. In general colour richer than 

 the cJ. 



A common species and variable, both in the ground-colour as 

 well as in the markings of the anterior wings. Much resembling 

 Lith. navana, but readily distinguishable by having a dark spot 

 beyond the middle of the wing } nearer to the dorsal margin than to 

 the costa. 



The imago appears in April and May in woods, in the south 

 and west, and north-west, of England. It occurs also in Ireland 

 and in Scotland. 



The pupa is 3 lines long, very acute at the caudal extremity, 

 of a pale reddish brown colour. 



The larva feeds on the Birch and Alder : it is about 6 lines in 

 length, with the head hazel colour, shining, and diaphanous, 

 palest in front. The shield also hazel colour, darkest behind ; 

 the body bright yellowish green, with oval whitish elevated 

 spots, and two black points in each, marking the insertion of 

 hairs. The anal segment with a round, white, opaque plate with 

 a few punctures on the surface. 



2. inmrundana, Fisch. v. E,. Alis anticis albidis, aut fuscis ; fascia 

 basi triquetra cinereo-fusca, punctoque postico brunneo marginem 

 costalem versus ; posticis fuscis apice saturatioribus. <J Exp. al. 

 lin. 



Head dull brown. Face dusky brown above, white below. Eyes 

 black. Palpi above and at sides fuscous ; beneath, at base drab, at 



