Coleoptera and 
Lepidoptera by 
Georg Dahl, 1823. 
Introduction, pp» III -IV, only trarslateds 
For 30 years, the time during whieh I have been engaged in entomological Collection 
and exc hange, numerous patrons and friends have, often repeatedly, expressed the desire 
that I would be willing to arrange the large Stocks that I have acquired, systematically, 
and to prepare lists of them for examination and selection. But in part the long and 
difficult journeys robbed me of the requisite Muse, in part^SBdft whieh would have deter- 
mined and named so inuch that was still unknovm» The latter circumstance has been wholly 
relieved, so far as Coleoptera are concerned, by Dejean’s exceilent Catalogue of Coleoptera 
(Paris. Cr6vot 1821); and the way has been opened for the Classes of the larger European 
butterflies by my deceased but unforgettable friend Ochsenheimer by exact descriptions , 
as well as by Jakob Hühner by true drawings,so far that I could follow the System of the 
first two with some modif ications and, where Ochsenheimerfe initial work stopped, could 
use the copper plates of the third as guides. Here and there I have inserted entirely 
new discoveries; much originated with me; I was conscious that I had to proceed with cool 
calmness and strict verifying» The prices given are understood as in coin of the Conven- 
tion and in every species are for one specimen; most can be had in pairs. On Orders for 
more than 100 florins I allow a discount of 15 percent. Everything for whieh prices are 
given is in stock, the ones that I lack will be accepted in good specimens, by way of ex- 
change» I take proper care to supply clean specimens as far as possible and to assure 
proper packing. Unknown buyers will send the first half of the amount with the order, 
but the 2nd half on receipt of the shipment» 
list 
If this/serves the purpose of making distant specialists and devotees of entomology 
more closely acquainted with mp, and supporting beginning collectors in the arrangement 
of their Stocks, I will consider its two-fold purpose fulfilled; in any case, however, 
I wish to recommend it for examination by all specialists and judges. 
Jan. 21, 1823 
Tr.sR.Ericson 
5/16/57 
