280 
on the same plants, and many of these are like those of 
Sialis, arranged in bunches, containing hundreds of eggs. 
The Trichogramma which are at this time emerging in 
large numbers from their first host wander over to the next 
and continue so on through the summer. 
The following are some dates etc. collected when 
" breeding the species: — 5th and 8th Juni 1905. Van- 
gede Fen near Gentofte. In this fen were collected about 
five hundred short stumps of the willow branches remaining 
on the main stems after the one year shoots had been 
cut off for basket-making, the pith in these stems having 
been eaten out by the larve of various insects. All the 
five hundred were put in a large glass jar and placed in 
a sunny window. The flies emerged about eleven o'clock 
in the forenoon and wandered up on the paper-lid. 
Date Øg O Date ( 4 Q 
ARTE (at! A a ee 
27 1 1 b/g 0 4 
ARE SENG esa cs EET 
ap 1 0 ur 0 5 
1, 16.0 8, 1203 
JE 0 1 9/, 0 1 
ED | 
making a total of 11 males and 20 females, of which one 
apterous male, the remainder all winged. Also bred from 
the same locality and material in 1906, but not later from 
this place. 
From the eggs of L. camelina (?) found on the leaf of 
an oak in Fortunens Indelukke in Dyrehaven near Copen- 
hagen were bred as follows: — 1 egg found 5/, bred 2°/, 1909, 
13 QQ; from 3 eggs found 28/, 1907, bred 1%/, 1907 18 OQ; 
12/ 1911 some eggs, bred 8 OQ. Further from same loca- 
lity by sweeping in grass, very frequently, always females, 
dates from 24/, to °°/;. Males have also been bred from 
unknown butterfly-eggs but only winged forms. Bred 
