ADVERTISEMENT. 
The great inconvenience which Entomologists lie under for the want 
of labels for their cabinets, and the length of time occupied in writing 
them, has induced me to print a few copies of the Index to the Compen* 
dium separately and on one side only. This catalogue, although far 
from being a complete one, is certainly the most extensive that has hi-, 
therto appeared; and the difficulty of obtaining the names of the other 
species is rendered less, as most of those which are synonymous in one 
genus may be applicable to another; so that in fact 5,000 specifio 
names at least may be obtained from this little work. 
It may also be used for another purpose, namely, for lists of dcsidei 
rata, as the Entomologist can by a cross or other mark notice such 
species as he possesses. I should recommend a line drawn from left 
to right for the male sex, thus \ ; and a line from right to left / for 
females; by which means he can tell not only what species are deside¬ 
rata to him, but likewise the sex. 
The method of cutting the name out as a label for the cabinet, is to 
place a card under the page containing the name; the name may 
then be cut out with a sharp pointed pen-knife without injuring the 
page beneath. 
