1S83.] 137 



Nederland,"p. 123, is a"Bijdrage tot de Soortkenuis derHyponomeutse," 

 by H. W. De Graaf, here, at p. 132, the autlior mentions that he had 

 in that year (1852) found the nests of the larvae of H. rorellus on 

 many willow-trees in the neighbourhood of Woerden during the month 

 of June, when the larvse were nearly full-grown. 



In the third volume of the " Bouwstoffen," p. 221 (the article 

 appeared in 1864), De Graaf informs us that in 1853, when riding along 

 the road by Grouda, near Eotterdam, he noticed that the willow-trees 

 along the road-side had many of the webs of these larvae on them ; he 

 afterwards also noticed them near Ley den. He mentions as other 

 localities where the insect had been observed, Amsterdam, and Gron- 

 tum, in Friesland. 



P. C. T. Sjielleu's great work on the Micro-Lepidoptera of the 

 Netherlands (De Vlinders van Nederland, Microlepidoptera, 8vo, 

 pp. 1196) appeared last year, and we there, p. 508, find mentioned 

 two additional localities : the late van Medenbach de Eooy having ob- 

 served the insect in Glelderland, and van den Brandt had met with 

 it at Venlo, in Limburg, 



A point of interest in the habits of the insect is at present not 

 clear, and it would be very desirable to ascertain which of the obser- 

 vations recorded is the correct one. 



Zeller, in the Isis, 1844, p. 219, says that the cocoon of the pupa 

 is slight and transparent, like that of variabilis (our padella), but Ver- 

 Huell says that the larvae make no separate cocoons, and De Graaf 

 says even more distinctly that the pupae hang naked in the main larval 

 web ; if so, it would show an affinity in habit to Scyihropia cratcegella, 

 but I confess I should like to have further precise information on this 

 subject. 



There are, no doubt, many entomologists amongst us, who, though 

 probably indifferent as to adding a species to their collections, would 

 still find a pleasure in proving the erroneous nature of some observa- 

 tion recorded by a previous writer, and here they are certain to have 

 that pleasure, as the pupa cannot both be naked and enclosed in a 

 slight cocoon, so that there must be error somewhere. 



As noticed at the commencement of this article, the perfect 

 insect can hardly be distinguished fi'om many forms of H. padellus, 

 though the more distinctly white costa on the under-side of the 

 anterior-wings is indicated as a good character. 



Mountsfleld, Lewisliam : 



Auffust 17th, 1883. 



