256 TORTRIC1NA. 



10. Penziana, Thunb. Alls anticis niveis, aliquando cinereo irro- 

 ratis ; fasciis tribus irregularibus atris ; posticis nitidis albidis. 

 c? Exp. al. 10^-12J lin. 



Head white, slightly yellow behind. Face dirty white. Eyes 

 black. Palpi longer than the head, white above and between, dusky 

 grey at the sides and beneath ; apical joint dusky, with the tip white. 

 Antennae glossy, fuscous. Thorax and patagia white, banded trans- 

 versely with dusky grey, the crest marked anteriorly with grey. 

 Anterior wings dull white, with smoky black markings, speckled and 

 edged with black ; the base, especially on the costa, speckled with 

 black, followed by a very angulated fascia, widest to the angulation 

 at the middle, from thence receding and diminishing to the dorsal 

 margin, which it does not always attain ; at the middle of the costa 

 commences a broad fascia, angulated on both sides, widest at its mar- 

 gin, diminishing to the middle, then curving and slightly receding 

 to the dorsal margin, within the anal angle ; this fascia encloses a 

 small white space on the costa, and is followed by another, in shape 

 something like the map of North and South America ; the apex and 

 apical margin speckled with smoky black. The pale portions of the 

 disk slightly streaked and speckled with black. Apical scales dull 

 white, alternated with patches of black. Cilia slightly glossy, grey, 

 with pale bases and hoary tips. Posterior wings glossy, very pale 

 grey, darkest towards the margins. Marginal scales and cilia white. 

 Abdomen clothed with pale buff scales, the caudal tuft pale primrose- 

 colour. Exp. al. 11-13 lin. Markings of the anterior wings 

 broader and more distinct than in the J 



The largest known British species, and, except C. cinctana, the 

 most distinctly marked. It is most like C. octomaculana, but 

 considerably larger, and the anterior wings are narrower, the mark- 

 ings more numerous, blacker, and more oblique. In the typical 

 insect (vide Curt., B. E., pi. 100), the ground-colour is white. 

 There is a beautiful variety taken plenteously by Dr. Colquhoun 

 at Ardrossan, which has the ground-colour grey, but the mark- 

 ings are the same. 



The imago appears in July, and may be taken in the day-time 

 sitting on the faces of rocks. It is entirely a Northern and 

 Scotch species. It occurs in North Wales ; also at Torwood, 

 Ardrossan, and in the vicinity of Edinburgh. 



11. nubilana, Hub. Alis anticis nigro-fuliginosis strigis punctisque 

 saturatioribus ; posticis aureo-brunneis. ^ Exp. al. 6-J lin. 



Head and face dull brown. Eyes black. Palpi as long as the 

 head, dull brown, paler beneath. Antennae glossy, fuscous, alter- 

 nated with grey. Thorax and patagia dull brown, with a slight grey 

 irroration. Anterior wings slightly glossy, dusky bronze-brown, with 



