TORTRICINA. 269 



undefined borders, somewhat dilated on the dorsal margin. At the 

 apical margin is a paler cloud in the middle, nearly joined to the 

 central fascia. The costa is marked with six pale, slightly silvery 

 geminations, with brown interspaces, two before, and four beyond the 

 middle. The two former unite, and are produced as a broadish 

 lustrous streak to the dorsal margin ; of those beyond the middle, the 

 second one is produced interruptedly to the anal angle ; the apical 

 and subapical ones are also produced ; the first may be traced in a 

 series of dots irregularly placed, that at the middle of the disk being 

 brightest, and of a bluish colour. Near the base, on the basal patch, 

 is an indistinct, curved, lustrous streak, brightest on the costa. Apical 

 scales dark brown, with drab bases. Cilia glossy, drab, speckled with 

 iron-grey at the apex, and before the anal angle. Posterior wings 

 with a subdued gloss, clothed with coarse dark fuscous scales upon a 

 grey ground. Marginal scales glossy, paler fuscous ; bases whitish. 

 Cilia whitish, with a grey tinge. Abdomen glossy, dark grey ; the 

 caudal tuft drab. $ Exp. al. 8 lin. 



An uncommon species ; very variable, both in size and colour. 

 The ground-colour ranges from pale drab to bright ochreous, 

 and the markings from dark fuscous to umbreous. These latter 

 sometimes suffuse the whole surface of the anterior wings. Very 

 closely allied to S. lacunana, but slightly larger in size. 



The imago appears in July and August, and occurs in the 

 east of Norfolk, in Suffolk, and in the north of England. In 

 Scotland it occurs rather freely on marshy ground. 



5. alternana, Curtis. Alis anticis subochraceis, squamis nigris 

 irroratis ; posticis nitidis, umbreis pallidis, apice saturatioribus. 

 c? Exp. al. 8 lin. 



Head dull ochreous, mixed with black scales between the antennse 

 and behind. Face dull, ochreous above, whitish below, a transverse 

 row of blackish scales in the middle. Eyes intense, purplish brown, 

 with a velvety appearance. Palpi longer than the head ; above and 

 at the sides dull ochreous, drab beneath and between; the apex 

 dusky. Antennee alternated with drab and black; the basal joint 

 clothed with dull ochreous scales above, and with shining pale drab 

 scales beneath. Thorax dull ochreous, mixed with blackish scales, 

 drab behind. Patagia similar to the thorax ; the apex glossy. An- 

 terior wings glossy, dull ochreous, thickly irrorated with blackish 

 scales, which in the aggregate appear as forming a dusky cloud from 

 the base to beyond the middle; darkest at its extremities, and 

 extending on the dorsal margin to near the anal angle. On the 

 apical margin is another dusky cloud. The costa towards the base is 

 alternately marked with ochreous and black. Apical scales ochreous. 

 Cilia grey. Posterior wings glossy, pale umber, slightly paler at the 

 base. Abdomen glossy, dark grey; the caudal tuft pale ochreous. 



