REMARKS ON THE SPECIES OF THE GENUS NEPTICULA. 37 



the larvK were plentiful there in the middle of July, in the 

 leaves of Soi'bus aucuparia^ will also be only single-brooded 

 there, since in autumn the pupse still contained the well de- 

 veloped living imago. 



In spite of the most careful search last summer for 

 OxyacantJiella in the hawthorn hedges, where the larvae 

 had been extremely plentiful the previous autumn, I could 

 not find a single mine, although Stainton says expressly that 

 it is double-brooded. 



With regard to the duration of the larval state, this is ex- 

 tremely short, especially in the summer brood, yet possibly 

 the different species vary also in this respect. In the 

 summer brood of 3Ialella, Buchheister noticed that on a 

 young apple tree frequented by these larvae, after he had 

 very carefully removed from individual twigs every mined 

 leaf, in thirty-six hours he already found empty mines, and I 

 have noticed similar occurrences with Plagicolella. On the 

 other hand, of the autumnal brood of Plagicolella I have 

 had larvae still in the mine for five or six days after the last 

 moulting, and the same has happened with larv£e of Splen- 

 didissimella, Ruhivora, Angulifasciellay Ruficapitella and 

 others. 



The larvae of Acer is must have a very short duration of life 

 even in autumn, for though the mines are not scai-ce on some 

 maple trees and maple bushes of our promenades here, 

 neither in summer nor autumn have I yet succeeded in 

 finding a mine still tenanted, although I have searched the 

 said trees and bushes almost daily, or at any rate on alternate 

 days. 



That the Nepticula larvae moult is already noticed in 

 Herrich-SchafFer's Correspondenzblatt, II. p. 174.* I have 

 observed the moulting in Rujica'pitella, Anomalella, Splen- 



[* A translation of this notice is given in the " Weekly Entomo- 

 logist," No. 10, p. 76.— Ed. E. A.") 



