32 TORTRICINA. 



its termination. The basal patch is distinctly visible ; darkest pos- 

 teriorly, and composed of umber streaks, thickly covered with patches 

 with a bluish gloss. The central fascia umber, with darker shades 

 and bluish streaks exteriorly on the costa and towards the dorsal 

 margin. The space between the basal patch and central fascia as 

 dark as either, but entirely suffused with a bluish gloss, and in 

 some instances made up of blue ocellated spots. The dark spot 

 at the exterior margin of the central fascia is large, and suffuses 

 ivith the fascia itself, forming a prominent node upon it, accom- 

 panied by an apparent sharply- curved incision. The apical portion 

 of the wing is thickly clouded with dark dusky brown, with two 

 longitudinal black streaks edged narrowly with cream-colour between 

 the central nervures ; at the apex is a distinct dark eye-like spot, 

 preceded by two conspicuous marks on the costa. Apical scales dark 

 brown. Cilia smoky -black, slightly shining, and of a bluish tinge, 

 both becoming cream-colour at the anal angle. Posterior wings 

 deep fuscous, darkest at the margins. Marginal scales darker, with 

 pale fuscous bases. Cilia pale fuscous. Abdomen fuscous. $ Exp. 

 al. 8 lin. Anterior wings marked as in the <5 , but the delineation 

 more distinct, and the colours richer. Posterior wings darker than 

 in the <$ . 



The darkest-coloured of the known British Antithesis; the $ 

 darker than the 6 . Allied to A. Sellana and to A. Gentia- 

 nana ; in size larger than the former and smaller than the 

 latter. Distinguished from both by the dark colour of the basal 

 cloud, its defined posterior margin, and the paler colour of the 

 pre-apical portion of the wing. 



The imago appears in June, and was first captured at Leith 

 Hill, in Surrey, by Mr. Standish. It occurs commonly in the 

 north of England, especially in Lancashire. 



The larva feeds on the Bilberry (Vaccinium Myrtillus). 



12. Gentianana, Hub., Haw. Alls anticis albidis aut pallide ochra- 

 ceis ; basi pone medium nigro, brunneo, cinereo, caeruleo, liturisque 

 albidis variegatis ; margine postico fusco-strigato ; ad angulum 

 analem et supra in medio punctis atris ; posticis fuscis, margine 

 saturatioribus. J Exp. al. 7^9 lin. 



Head dull brown, paler behind. Face dull brown. Eyes black. 

 Palpi doll brown a. apex, pale drab at base. Antennae obscure 

 brown. Thorax dull brown, alternated with cream-colour. Patagia 

 ochreous, with a brown patch at the shoulder. Anterior wings dull, 

 cream-colour, the dark portion extending two-thirds along the costa ; 

 its posterior edge passing in a slightly oblique direction to the dorsal 

 margin. The basal patch angulated and much mottled and streaked, 

 composed of fuscous, grey, dark brown, black, and lustrous blue 

 markings, speckled with cream- colour, and its lower edge somewhat 



