146 
Summary. 
In the year 1900 Dr. Wesenberg-Lund observed trumpet- 
shaped' catching-nets made by larvæ- of Trichoptera. He first found 
hese nets in the outlet from Filsø, a lake in Western Jutland. 
Later he also found them in 3.localities on Zealand. 
.In' literature, as far as the author knows, only two cases of 
catching-nets made by larvæ of Trichoptera have been mentioned, 
and in both cases from America. 
In ,,Uber die von den Trichopterenlarven der Provinz Santa 
Catharina verfertigten Gehåuse" in the Zeitschr. f. wiss. Zoo- 
ogie, Band XXXV, 1881, pag. 47—87 Dr. Frits Miller men- 
tions a catching-net made by a species of the American Hydropsy- 
chid genus Ryacophilax Miill.; fig. 1 is a copy of Miller's 
drawing. 
In the ,,Report of the Entomologist", Washington, 1886, 
pag. 510 Mr. Howard has written a paper on a Hydropsyehid 
larva, which  spins a catching-net before the entrance to its: case. 
The author has not read this paper, but has quoted what Sharp 
has written on pag. 483 of his work Insects I in the ,,Cambridge 
Natural History". Fig. 2 is a copy of Sharp's drawing. 
Together with Dr. Wesenberg-Lund I have visited the 
three localities on Zealand, viz. the connection between Farum lake 
and Furesø, the connection between Tuel lake and Sorø lake and 
the connection between-Gjørlev lake and Haraldsted lake (Tissenbæk). 
In all the three. localites we found the same larva with its beneBre 
trumpet-shaped web, which fig. 3 represents. 
The Trichopteron, whose larvæ spin these webs, is Neure- 
clipsis. bimaculata L. 
In all the. localities there was a road across the connection, 
and the larvæ were found in the stone-drains under the bridge, 
Æhere the run of the water was somewhat rapid, and the ground 
gravelly and sandy. The nets were not supported by any straw 
or vegetable substance, their mouth always heading up the stream, 
SE 4 
