TOUTRTCINA. 25 



basal cloud. In many specimens patches of white are present, 

 which give the insect much the appearance of A. corticana] but 

 its smaller size, the narrow or elongated anterior wings, and the 

 clouded apex at once distinguish it. 



The beautiful figure of Curtis (Brit. Ent. No. 567 rf), under 

 the name of Penthina Grevillana, well represents a dark instance 

 of this species. Mr. Stainton describes this insect in the ' Zoo- 

 logist/ p. 1988. It is very rare on the Continent. 



The imago appears in May and June among Birch-trees, and 

 specimens have been captured by Mr. Douglas at West Wickham 

 and Dulwich Woods j also at the former locality by Mr. Waring; 

 Our own specimens were taken, from the beginning of May 

 to the middle of June, at West Wickham Wood. According to 

 Mr. Stainton, this is a commoner insect in the north of England 

 and in Scotland. 



The larva in all probability feeds upon the Birch, but this is 

 mere conjecture. 



5. ochroleucana, Hub. Alls anticis pallidis ochraceis; basi pone 

 medium nubilis maculisque brunneis variegatis ; apice strigulis 

 punctisque costalibus fuscis ; posticis fusco-griseis. tf Exp. al. 

 9-10 lin. 



Head and face dusky drab -brown. Eyes black. Palpi dull brown, 

 dark drab below, at sides and beneath. Antenna? fuscous. Thorax 

 dull brown, streaked transversely with dusky drab, the crest casta- 

 neous. Patagia dull brown at the base, the apical half dusky drab. 

 Anterior wings dull, pale ochreous, the dark portion extending 

 rather more than half along the costa, and to near the anal angle on 

 the dorsal margin ; its apical edge irregular and convex ; its colour 

 dark dull brown mixed with darker shades, and bearing here and 

 there small patches of a slightly lustrous pale violet hue ; the in- 

 terval between the basal patch and the central fascia is indicated by 

 a pale space on the costa, and another irregular an'd undefined one 

 near the dorsal margin and about the fold ; in some cases there is a 

 dark brown spot surrounded by a pale ochreous margin, and near it 

 are other irregular markings of the same colours. The costa is 

 broadly streaked throughout with brown. The apical portion of the 

 wing is more or less distinctly marked with the same colour, and 

 with one or two dots near the dark cloud, and others smaller, nearer 

 the apex ; the apical margin brown. Apical scales dark brown, with 

 pale ochreous bases. Cilia straw-colour ; both becoming paler at the 

 anal angle. Posterior wings clothed with coarse fuscous scales on a 

 pale grey ground. Marginal scales pale fuscous, with luteous bases. 

 Cilia grey, with a fuscous tinge. $ Exp. al. 9^-10 lin. Abdomen 

 fuscous, the caudal tuft dull drab. 



