4 
Edition is of much consequence, as far as an Index is concerned, 
as after that Heft the two Editions are identical in all im¬ 
portant matters. Up to that point the differences in the 
numbers and in the names given to the species are very 
numerous, so that, unless a writer knows which Edition he has 
before him, constant confusion may arise from wrong quota¬ 
tions, &c., and this difficulty is increased by the fact, that very 
few copies seem to be uniformly of one Edition. I have been 
able to consult five or six, and not one is complete throughout 
as a Ist Edition. I may liere remark, that the numbers on the 
letter-press of the species in Heft 2 do not agree with the 
wrapper throughout in either Edition. 
It is not always easy, nor is it possible I believe in every 
case, to say for eertain whether a plate and its letter-press 
belongs to the 1st or 2nd Edition. The two Editions can be 
distinguished up to Heft 26, as far as the Coleoptera are con¬ 
cerned, because the 2nd Edition quotes a work of Panzer’s 
(“ Entomologia Grermanica ”) which was published in 1795, 
after the 24 Hefts of the 1st Edition had appeared. This work, 
however, only treats of the Coleoptera, and for the other Orders 
one can only be guided by occasional quotations and remarks, 
and the less careful colouring and less distinct outlines. The 
plates of the 2nd Edition appear to have been in most cases 
merely struck off the old plates of the 1st Edition; but, in 
some, an enlarged figure of the species has been added, and in 
others entirely fresh plates seem to have been used. 
The wrappers of the Hefts often show more plainly the 
Edition than the plates themselves. The 1st and 2nd Hefts of 
the 1st Edition have the printing of the headings of the wrappers, 
viz., “ Inhalt des —ten Hefts,” in much larger type than those 
of the 2nd, and the line under it is widened in the middle ; 
also the wrapper of the 1st Heft in the 1st Edition gives no 
authors’ names. From the end of the 2nd Heft up to the end 
of Heft 25, in the 1st Edition, “ Inha,It des —ten Hefts ” is all 
in one line ; whereas, in the 2nd Edition, “ Inhalt ” is placed 
