144 TORTRICINA. 



wise marked as in the <$ . Apical scales and cilia white. Posterior 

 wings darker than in the <$ . Marginal scales and cilia white, or 

 very pale straw-colour. 



This species varies considerably in size as well as in colour. 

 It is not of very frequent occurrence in the South, but is tolera- 

 bly abundant in some parts of Scotland. It is distinguishable 

 from all the other British Anchylopera by the oblique fascia 

 across the wings beyond the middle. 



The imago appears in May and June in heathy places. It 

 occurs at the New Forest, and in the North of England, on the 

 " Mosses/' In Scotland, at Airthry, Ambleside, and on the 

 Pentland Hills ; at the latter locality in abundance. 



Genus IV. BACTRA, STEPHENS. 



Antennae very long and slender, pubescent. Palpi longer than the 

 head, stout, porrected horizontally, remote, clothed with long scales 

 above and beneath towards the apex. Basal joint moderately stout, 

 oblong, drooping, truncate ; apical slender, obovate, longer than the 

 basal; middle very stout, beyond the middle ascending, curved, 

 scarcely three times as long as the apical. Maxillae shorter than the 

 palpi. Thorax slender ovate. Anterior wings : length more than 

 twice the width ; costa regularly arcuated ; apex acute ; apical margin 

 entire, oblique ; dorsal margin rounded. Venation normal. The dis- 

 coidal cell extends two-thirds along the wing. Posterior wings 

 long ; apex acute ; apical margin concave ; dorsal margin entire. 

 Abdomen long and slender, rather stouter in the d , tufted in both 



This genus is associated with the preceding in consequence of 

 the acutely-formed apex to the anterior wings, which, however, 

 is not produced, but, with the entire apical margin forms a very 

 sharp angle, and imparts to the wings a similar appearance 

 to those organs in Anchylopera. The species are of dull co- 

 lours, very simple markings, and subject to considerable varia- 

 tion in both respects. They may be met with throughout the 

 summer months, frequenting damp places. The larvae are but 

 imperfectly known. 



The three British species are thus tabulated : 



A. Anterior wings pale, with (in the $ ) a conspicuous 



black spot on the disk Species 1 



B. Anterior wings dark, with a blackish spot or mark in 



the centre Species 2 



C. Anterior wings dark, clouded with brown .... Species 3 



