1880.] 239 



On July 26tli, I again found larvse feeding in dwarfed Bhoots of 

 the same plant, feeding on the pith, and lining the burrow with frass. 

 From these the second brood of moths appeared at the end of August. 



DicTiroramplia simpliciana, Haw. The food plant of this species 

 has long been known, in fact, it could hardly be mistaken, as the moth 

 scarcely ever leaves it. Heinemann simply says of it, " from October 

 " to April in roots of Artemisia vulgaris.'''' "Wilkinson describes the 

 larva, "yellowish-white, with a hazel-coloured head." It does not 

 appear to be found in this neighbourhood (Pembroke), where indeed 

 its food plant (the mugwort) is not very common, and I am indebted 

 to Mr. F. D. Wheeler, of Norwich, and Mr. W. "West, of Grreenwicb, 

 for larvse. This larva is cylindrical, colour dirty whitish, with an ir- 

 regular dark internal dorsal vessel. Head light brown, dorsal and 

 anal plates faintly brownish. It feeds through the winter and spring 

 in the root-stocks and lower part of the stems of Artemisia vulgaris, 

 making burrows under the bark, and Mr. "West tells me that near 

 London, when it is abundant, the larvse feed in small companies of five 

 or six together. The pupa is bright brown, in a cocoon within the 

 burrow, from which it projects when the moth emerges, w^hich takes 

 place towards the end of July. 



Dichrorampha tanaceti, Stn. The food plant of this species has 

 also long been known. In the year 1872, the late Mr. D'Orville, of 

 Exeter, wrote to me : " They are on the wing about the end of May and 

 " beginning of June. They fly in the hot sunshine, and regularly 

 " breed in my tansy-clump." I do not think, however, that any de- 

 scription of the larva has been published. 



I have received them from Mr. W. H. Gri'igg, of Bristol, and have 

 also dug out a few from hedge-banks in this neighbourhood, but w'ith 

 much difliculty, from the tangled state of the place in which the 

 tansy grows. . 



This larva is short and stout, colour semi-transparent white, with 

 distinctly visible brown internal dorsal vessel, and colourless shining 

 raised dots. Head deeply lobed, light brown, mouth darker brown, 

 dorsal and anal plates very faintly brownish, both mottled with darker 

 brown posteriorly. In root-stocks of Tanacet^im vulgare, mining when 

 young under the bark, w'here it may be found lying curved in its 

 burrow, when older penetrating to the centre of the root-stock, and 

 feeding on the pith. It feeds through the winter and spring, and 

 assumes the pupa state in the burrow in May. My moths emerged 

 early in June, and I found specimens at large (the males) flying very 



