with descriptions of several exotic species of Ants. 85 
Lastly, of the abdomen, it may be stated that the peduncu- 
lated base is especially characteristic of the ants, and that the 
trispinose apex is only found,as Mr. Shuckard notices, in an 
American Ant. 
One of the most important characters employed by Mr. 
Shuckard in his descriptions of the Dorylide, is that derived 
from the structure of the male genital organs,—a character 
which has already been employed by Audouin in the Bombi, 
and by Vander Linden and others in the Libellulide, and 
proved to be of very great value in determining the species of 
these insects. Mr. Shuckard, indeed, says, that in respect to 
its large size in the Dorylide, Sat exclusively resembles several 
of the solitary Heterogyne,” and hence he considers the ana- 
logy as strongly in favour of the connexion of these genera 
with the Mutillide. He, however, overlooks the fact that the 
males of all those groups which swarm in the air at certain 
periods of the year are furnished with very large organs of 
generation, and for a very evident purpose. ‘This is extra- 
ordinarily the case in the wasps, as well as in the hive-bee, 
the Ephemerz, Chironomi, and the Ants. As regards the first 
‘and last of these groups, reference may be made to the plates 
of DeGeer’s 2nd volume, or the figures 85.5, 88.6, in the 2nd 
volume of my ‘Introduction.’ In these groups, however, the 
males are much smaller than their partners, and therefore the 
analogy thence assumed in respect to the Dorylide does not 
necessarily exist. 
Such are the considerations which induce me (although in 
the absence of an opportunity of ascertaining by internal dis- 
section the state of the sexual characters of the individuals of 
Typhlopone yet observed) to consider these insects as being 
unquestionably neuter Ants. And as they are equally strong 
when applied to the African genus Anomma, I have no more 
hesitation in deeming that genus equally Formicideous, as it 
differs only in trivial characters from Typhlopone. 
I had proposed to myself to have extended these remarks 
to an examination of the opinions entertained by Mr. Shuck- 
ard relative to the sexual relationship between Typhlopone 
and Labidus, the parasitic nature of the Dorylide, the relation- 
ship between the latter and the Mutillide, and the observa- 
tions on Scleroderma; all of which I consider untenable. I 
must, however, defer these subjects till another opportunity. 
Before laying down my pen, however, I must express the 
pleasure I have received from the careful manner in which 
Mr. Shuckard has executed the descriptive portion of his me- 
moir, and the ingenious manner in which he has treated the 
conjectural part. 
