plants, and are thus not affected by smoky or other deposits on 

 the leaves ; hence it occurs in many places near towns and in 

 the neighbourhood of works, where larvae, feeding on the leaves, 

 could not survive. It is decidedly the commonest of the genus. 

 A darker variety sometimes occurs, without the rosy hue which 

 gives the trivial name. This might easily be mistaken for the 

 next species. 



110. H. Petasitis, Dbld. Butter Bijk. 

 HydrcBcia Petasitis. Staint. Man., vol. i., p. 198. 



„ ,, JS'ewm. Brit. Moths, p. 281. 



,, ,, Barr. Lep. Brit. Is., vol. v., p. 68. 



Caradrina ,, Meyr. Hdbk. Brit. Lep., p. 119. 



Laeva. Buck., vol. iv., pi. Ixii., fig. 3. 

 This species probably occurs wherever there is an abundance 

 of the food plant, Petasites vulgaris (Butter-bur). I have no 

 records for Northumberland, but the insect is certain to occur 

 by stream sides and in places where the food grows freely. Mr. 

 Sang took the insect at *• Nag's Head" on the Teeside near Dar- 

 lington, on 27th July, 1857. Mr. Gardner found the pupae on 

 the banks of a small stream near Greatham in 1881, and has 

 subsequently found it in Upper Teesdale. After Mr. Gardner 

 had shown me how to find the pupa at Greatham, I found it in 

 a similar locality at Dalton-le-Dale, near Seaham Harbour, on 

 the stream side to the east of the turnpike. The larva fseds 

 under the surface of the ground on the stems and roots of the 

 plant, and the pupa must be carefully dug for about the second 

 or third week in July. 



GORTYNA3 Och. 



111. Gortyna flavago, Esp. Peosted Okange. 

 Gortyna flavago, Staint. Man., vol. i., p. 196. 



„ „ Newm. Brit. Moths, p. 279. 



,, „ Barr. Lep. Brit. Is., vol. v., p. 73. 



Ochria ochracea. Meyr. Hdbk. Brit. Lep., p. 110. 

 Laeva. Buck., vol. iv., pi. Ixii., fig. 1 ; O.Wils., pi. xxxiii., 



fig. 8. 



