652 Mr. H. T. Stainton on the 



Drurella, F., Eximia, Haw. Monsieur Fologne had shown me in 

 1861 his drawings of the larva and mine, and had inquired whe- 

 ther the transformations of this species had been already pub- 

 lished. I assured him that this had not yet been done, and advised 

 him strongly to publish his notes and drawings. Every ento- 

 mologist acquainted with the larva, mine, or perfect insect, will 

 immediately recognize the accurate fidelity of the representations 

 given on Plate II; of this volume — a plate at which it is impos- 

 sible to look without a sensation of pleasure. 



Fologne writes as follows (pp. 162, 163): — 



" This beautiful species is very common in the larva state in 

 the neighbourhood of Brussels. I have observed it at Boitsfort, 

 at Woluwe-Saint-Pierre, Etterbeek, Ixelles, &c. 



" The mines excavated by the larva in the leaves of the wild hop 

 (Humidus Lupubis) are very apparent ; generally each leaf con- 

 tains several of them. 



" The egg is always laid near one of the principal ribs of the leaf; 

 as soon as the larva is hatched it enters this rib, in which it mines 

 for some time ; it afterwards deviates from it to the right or to 

 the left, forming rather broad galleries, which it successively 

 abandons to return to the rib. When it is nearly full fed it forms 

 large irregular blotches, leaving only the two cuticles of the leaf, 

 so that the mine is then equally evident from the upper or imder 

 sides of the leaf. The colour of the blotches when newly made 

 is ochreous, but they become whitish with age. 



"The interior of the rib, which forms the centre of a mine, is 

 carpeted with white silk, which prevents it from being trans- 

 parent. 



*' The larva generally keeps itself concealed in this rib, only 

 quitting it for the purpose of feeding. Directly it is alarmed by 

 one's touching the leaf, it returns to its shelter, walking back- 

 wards. 



"Till nearly. full fed, it is almost unicolorous whitish, excepting 

 the head and second segment; but when it quits the leaf, it is 

 adorned with dorsal and subdorsal lines of a carmine tint. The 

 posterior part of the head is brown, and is seen through the trans- 

 parent second segment, which bears a brown corneous plate of an 

 oval form, divided by a pale central line. These larvse have six 

 anterior legs, eight ventral prolegs, and two anal prolegs. 



" They are full fed at the beginning of the month of September, 

 when they quit the leaf and descend to the ground, where they 

 enclose themselves in a tube of white silk, in which they pass the 

 winter unchanged, not assuming the pupa state till the spring. 



