PEMPEIJA DILUTELLA. 269' 



It is cylindrical, and, while young, dull dark grey, 

 with slightly darker dorsal line, spots pale grey, very 

 minute, head and both plates dull black, remainder of 

 second segment brownish. 



When full-grown it is dull greenish-grey, more 

 yellowish on the back, with narrow dorsal and sub- 

 dorsal lines of dark greenish-grey ; the third, fourth 

 and fifth segments are much wrinkled on the back ; 

 the head and plates still dull black. 



It lives in a loose silken pouch or purse at the end 

 of a passage of loose silk, under a spreading plant of 

 thyme (Thymus serpyllum), and comes out at night to 

 feed on the leaves. 



The pupa is light brown, in a thin cocoon of papery 

 silk in the silken habitation on the surface of the 

 ground. 



The moths emerged at about 8 o'clock in the 

 morning, and were generally to be found sitting, head 

 upwards, on a blade of fine grass, with the wings 

 wrapped closely round the body. (Charles G. Barrett, 

 6th November, 1879; E.M.M., December, 1879, XYI, 

 162.) 



On the 10th of May last, 1883, I received from 

 Mr. W. H. B. Fletcher, of Worthing, some half-score 

 larvae of Phycis adomatella. 



They varied in length from three-eighths to five- 

 eighths of an inch, the larger probably being nearly 

 adult larvae, and the smaller ones, which were pro- 

 portionately more slender, younger specimens. The 

 head has the lobes rounded ; in the younger specimens 

 it is about the same width, but in the older ones 

 narrower than the second segment; both it and the 

 frontal plate are polished. The body is cylindrical, 

 and of almost uniform width ; in the older examples 

 tapering a little at the extremities. The segmental 

 divisions are distinct, and a transverse depression on 

 each segment gives to the skin a slightly wrinkled 

 appearance. 



The ground colour of the younger specimens is 



