eB) 
firm and general principles is intended to remove. I ques- 
tion therefore whether his generic names can be treated 
otherwise than as synonymes of the genus he has di- 
vided. The same observations will also apply to what he 
has done in the genus Gorytes; but the value of his spe- 
cific descriptions is not at all affected by it. He is the 
first who has commenced seriously to monograph the ma- 
terials before him which have been accumulating since Fa- 
bricius wrote, since when but little attention has been paid 
to specific description, unless the insect presented charac- 
ters which rendered the construction of a new genus impe- 
rative. But I must be always understood as implying the 
exception of Vander Linden, and it must be kept in mind 
that I speak only of the aculeate Hymenoptera. I could 
dilate much upon this subject, but as it would lead me 
wide into the field of exotic Entomology, for the reasons 
named above, I will here terminate my remarks. I regret 
that I shall have occasion to differ frequently in opinion 
from the Comte de St. Fargeau, but when I do so, it is 
from the strictest conviction of his being in error, and with 
no other view than to prevent its diffusion; and J therefore 
trust it will not be misconstrued into any want of due re- 
spect for so veteran and able an Entomologist. 
§ 4. 
The following generalization of the external structure of 
these insects I have inserted for the purpose of enabling 
me to make such remarks as have occured to me in their 
investigation, which could not have been well introduced 
elsewhere, and which I hope will not be entirely without 
their use. 
The HEAD is generally transverse, sometimes wider than 
