Anterior wins ES 2.875 
Posterlor = a rn. 2 2 
[eS Ee cee re: 2 2D 
Petlisen: Seren). 4, 29%, 
Oxipasiogr tes erin eure: ne SED 
Antenna betes na, 2 2) 
SE RER Poe he ak oi IH 
All figures reproduced one third of original drawings. 
All the material which has been used in this present 
work has been collected and bred (in the cases where 
breeding has been possible) by myself. 
The types and the abundant material of earlier known 
species have been presented by me to the Zoological Mu- 
seum 3rd Dpt. in Copenhagen after the work was finished. 
With regard Prestwichia aquatica Lubb. however, I 
have only found the species on one ocassion (1 winged 
female); Magister Kaj L. Henriksen and Hj. Ussing ha- 
ving kindly placed their bred material at my disposal. 
To these gentlemen | beg to tender my best thanks. 
I express my thanks to the ,Carlsbergfondet“ for ha- 
ving presented me with my microscope thus enabling me 
to study these small insects, and for the support rendered 
me for travelling so that I have been able to undertake 
the collecting of material all over the country. 
Further I beg to thank „Det Steenstrupske Legat" for 
having on several occasions granted me funds to under- 
take journeys in Denmark. 
I further have to thank Messrs. Aug. West and Chr. 
Engelhart for their assistance in the translation. 
Lastly I beg to tender my best thanks to Mr. Gahan, 
Keeper of Entomology, British Museum, Nat. Hist, for his 
