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discover more than twenty species, it is a matter of course 
that more favourable zones than ours must be exceedingly 
rich in these species, as well as all others. 
With regard to the literature of the present day, this 
is much more extensive than when Taschenberg wrote 
his little book, but nevertheless it is not at all easier, 
by means of the help it offers, to work out the boundless 
wealth of the Chalcidide. 
Schmiedeknecht: Chalcididae (in Genera Insectorum: 
Bruxelles 1909) and Ashmead: Classification of the chalcid 
Flies (Washington 1904) only name the genera and even 
then in a very incomplete manner, as thus neither of these 
two authors refer to Aurivillius' Genus Oophthora with a 
single word. The reason is most probably that the paper 
on the Oophthora is published in the Swedish „Entomo- 
logisk Tidskrift", a very discouraging result of publishing 
articles in scientific periodicals of the small Nationalities. 
However, to start to write on all the Chalcidide in a 
single book or by a single author must be considered 
as quite hopeless at the present time. Otherwise than to 
follow Mayr’s example in his work „Die Europäischen En- 
cyrtiden“ is not possible. This work will in times to come 
be well worthy of being taken as a model by all future 
workers on the Chalcidide. When later on at some distant 
future time all the Genera of the Chalcidide are worked 
out as thoroughly as some of the European ones are, 
it will be time enough to make a systematic work on 
the Chalcidide. We who live now, may only hope to be 
able to assist by bringing stones to this great structure, 
and it this present addition to our knowledge of the 
group, will form one of these stones, I shall be. more 
than repaid for the work I have had for years in collec- 
ting the present material. 
After finding my first specimen of a trimerous Chaleid, 
Trichogramma evanescens, Juni 1902, in the act of depositing 
its eggs on the eggs of Sialis lutaria, | have felt the want 
