TOHTRICINA. 167 



leriana, but more generally, distributed over the country; is 

 common in the south of Scotland, and also in the vicinity of 

 Dublin. 



The larva feeds on the Sallow and Willow. 



Note. A considerable number of this species have been bred 

 by Messrs. C. S. Gregson and R. S. Edelston, for which the name 

 of P. potentillana was proposed by Mr. N. Cooke. This sup- 

 posed species is very variable : some examples have much the 

 appearance of P. Schalleriana, but it more generally resembles 

 P. comparand ; it also comes near to some of the paler forms of 

 P. tristana. The ground-colour of the anterior wings ranges 

 from the tint of grey, as in P. Schalleriana, to the rufous colour 

 of P. comparand ; the costal mark from ferruginous brown to 

 dark umbreous, but it never has the bright-red colour of the same 

 mark in P. Schalleriana. In some specimens the costal mark 

 is, as it were, made up of the commencement of a central fascia, 

 confluent with the subapical spot, which are sometimes faintly 

 produced, in the form of a fascia, to the opposite margin ; in this 

 last particular departing from what we usually see either in P. 

 Schalleriana or comparana. In size it is somewhat smaller than 

 either. The larva feeds on the Strawberry, preferring the white- 

 fruited kinds : vide the ' Entomologist's Weekly Intelligencer/ 

 vol. iv. p. 202. 



3. tristana, Hub. Alls anticis ochraceis ; macula trigona lata medio 



costae saturate fusca ; posticis griseis apice saturatioribus. rf Exp. 



al. 7-9 lin. 



Head and face dull umber. Eyes black, slightly shining. Palpi 

 above umber, at the sides slightly paler, drab beneath. Antennae 

 dark brown, the basal joint beneath pale. Thorax and patagia 

 umber, the latter slightly paler. Anterior wings glossy, sordid 

 ochreous, with a broad triangulate umbreous patch on the costa ; the 

 apical and dorsal margins speckled with umber ; a few minute con- 

 colorous tufts of elevated scales are placed towards the base and 

 along the inner edge of the costal patch. Apical scales rather darker, 

 and the cilia paler, than the wing, both becoming paler at the anal 

 angle. Posterior wings shining ; grey at the base, with a slight 

 fuscous tinge ; fuscous at the apex, with the margin darkest. Mar- 

 ginal scales fuscous, with paler bases. Cilia pale grey, with a fuscous 

 tinge. Abdomen dark fuscous ; the caudal tuft slightly ochreous. 

 Exp. al. 7-9 lin. 



A very variable species, both in size and colour ; in some spe- 

 cimens the ground- colour of the anterior wings is very pale 

 drab ; in others ochreous, going through the different shades to 



