MYELOIS PINGUIS. 243 



brown; the anterior legs are chestnut-brown, and 

 these, the head, the plates, and the ocellated spots 

 are highly lustrous, while all the rest of the body 

 appears soft and smooth, but without gloss. 



The pupa, while occupying the mine in the bark, is 

 closely enveloped with a coating of whitish silk, as a 

 cocoon so thin and clear that its form, and even a 

 little of its colour, can be rather plainly seen through 

 the silk, the head lying very near the entrance of the 

 mine, which is lightly blocked with frass, of which a 

 great quantity lies around and behind the cocoon. 



The pupa itself, according to sex, measures nearly 

 or quite half an inch in length, and one-eighth in 

 diameter at the end of the wing-covers ; the general 

 appearance is rather slender and of usual form, but 

 with the abdomen tapering off gradually to a rounded 

 tip without any projections ; its colour is light 

 brownish-ochreous or light reddish-brown on the 

 wing-covers, rather darker on the thorax and abdomen, 

 and with the surface glossy. (William Buckler, 23rd 

 August, 1878 ; E.M.M., December, 1878, XV, 162— 

 164.) 



Hypochalcia ahenella. 



On the 7th of July, 1883, Mr. W. H. B. Fletcher sent 

 me from the New Forest eighteen eggs laid on leaves 

 of Thymus serjpyllum and on bits of white leno. 



The shape of the egg is roundish-ovate, laid singly, 

 or overlapping one another a little, or in a cluster, 

 generally having a depression on some part of the 

 upper surface when laid on a leaf; the surface is 

 pitted finely all over. The colour is the slightest 

 remove from white, so faint is its tint of yellowish- 

 green, and glistening in a faint degree. 



On the 12th a greenish tinge became quite pro- 

 nounced though pale, and the eggs became filled out, 

 and on the 13th a rather large dark blackish-grey 



