10 1 TORTR1CINA. 



sutures chestnut-brown. The shield broad, shining, very trans- 

 parent, with several small blackish clouds thereon. The anal 

 segment slightly constricted. It is to be found in the roots of 

 the Yarrow (Achillea Millefolium) during the autumn, living 

 therein in the larva state till the following April, and is exceed- 

 ingly abundant. 



2. sequana, Hub. Alls anticis aureo-brunneis, fusco strigatis, 

 macula magna trigona dorsali sulphurea; strigulis costalibus 

 geminatis albidis ; posticis aureo -fuse-is. $ Exp. al. 4^ 5-J lin. 



Head dusky drab, pale yellow behind the eyes. Face slightly 

 paler than the head, below. Eyes dull black. Palpi longer than the 

 head, pale yellow at the sides, base, and beneath ; the tips broadly 

 fuscous. Antennae glossy grey. Thorax dark dusky drab. Patagia 

 dark dusky drab, with the apex speckled with pale ochreous. 

 Anterior wings pale umber, irrorated with ochreous scales towards 

 the apex ; the base and below the costal fold freckled with cream- 

 colour, and a large cream- or sulphur- coloured dorsal patch, with its 

 anterior margin sharply denned, and nearly straight ; its apex trun- 

 cate, and posterior margin angulated. The costa is streaked through- 

 out ; the streaks on the fold dusky, those beyond the middle cream- 

 colour, and somewhat geminated ; the two anterior ones produced into 

 lustrous blue streaks, one attaining the apical margin below the apex, 

 the other dilating into an indistinct lustrous cloud between the dorsal 

 blotch and the black dots (varying from two to five in number) upon 

 the apical margin. Apical scales umber. Cilia glossy brown or 

 iron-grey, with yellowish bases, both interrupted by a cream- 

 coloured streak through them, below the apical spot. Posterior 

 wings and marginal scales fuscous ; the latter with yellowish bases, 

 and the former with a cream-coloured edge at the -apex. Cilia pale 

 fuscous, with paler bases. Abdomen fuscous, the caudal tuft slightly 

 paler. Exp. al. 4^-5^ lin. 



An uncommon species ; tolerably constant in size and colour. 

 Allied to D. Petiverella, but smaller, and having the dorsal 

 blotch shorter, wider, with its apex truncate. The anterior wings 

 are also broader. 



The imago appears in June, flying at midday in grassy places. 

 It occurs in Norfolk, Gloucestershire, Devonshire, near Croydon, 

 and other places in the metropolitan district. 



3. politana, Schifi'. Alis anticis ochreis, olivaceo -fusco variis ; 

 macula margine dorsali inclistincta et irregular! ; strigis costalibus 

 geminatis albidis margine apical! punctis tribus atris ; posticis 

 atro-fuliginosis. tf Exp. al. 6^-7 lin. 



Head dusky ochreous, paler behind the eyes. Face paler. Eyes 



