279 
Localities: Ermelund, Fortunens Indelukke, Fuglesang- 
söen and other places in Dyrehaven; Vangede, Bøllemosen 
near Skodsborg, Rude Hegn, Præstevang, Ryget, Nyvang 
near Farum, Grib-Skov, Bidstrup Fen near Roskilde, Merrit 
Skov (Lolland), Varde Aa, Rold Skov, Madum Sö. 
Dates 27/, —?3/,. 
Host. Eggs of Sialis, Oxycera, Tabanus, Stratiomys, 
Chrysops, various Lepidoptera, Rhynchites betule etc. 
Hibernating unknown. 
Specimens in the Zoological Museum Copenhagen. 
From abroad the following hosts are mentioned: 
Carpocapsa pomonella (Schreiner); Panolis griseovari- 
egata G. and Bupalus piniarius L. (both in Wolff); Cly- 
sia ambiguella Hb. (Cochylis) and Polychrosis botrana 
Schiff (Eudemis) (both in Marchal); from Russia: Den- 
drolimus pini L., Malacosoma neustria L., Euproctis chry- 
sorrhoea L., Lymantria monacha L., Stilpnotia salicis L.; 
from Turkestan: Sarrothripus musculana Ersch., Cydia fune- 
brana L.; from Italy Mamestria brassicae L.; from Turke- 
stan Rhynchites auratus, from Russia Euxoa segetum Schiff., 
Pieris rapae. Agrotis segetum and Smerinthus populi. 
If at the end of May or beginning of June the observer 
walks along our Danish brooks and lakes (fens and 
ponds) where reeds, bullrushes or /ris grows along the 
edges and banks, the eggs of Sialis will not often 
be searched for in vain. Sialis lays its characteristic 
bunches of eggs on the leaves of these plants, each bunch 
containing numerous eggs placed on end close to each 
other; the colour is dark, sometimes with a little yellow 
in between so that the whole mass somewhat resembles 
the excrement of some bird. When examining one of 
these bunches, one or several female 7richogramma can 
be seen busily engaged in laying eggs. At the brook that 
runs through Bidstrup-Fen near Roskilde is one of the 
places where this can very frequently be seen. When the 
Sialis oviposition is past, there are other insect eggs laid 
