82 Mr. J. O. Westwood on the Genus Typhlopone, 
which are well known to be the habits of neuter Ants. Of the 
extraordinary pertinacity with which some of the latter retain 
hold of these and larger hae i I have collected various no- 
tices in my ‘ Introduction’ (v. 2, p. 230.), whilst the partiality 
of Ants for sugar is very great, and well known. One species 
is indeed named Formica Sacchariwvora by Linnzeus. 
I proceed, therefore, to structural peculiarities. 
The large and flattened head is not exclusively characteristic 
of the Formicide, but the want of eyes and ocelli occurs only 
in Typhlopone, and in various blind ants, mentioned m my 
‘ Introduction’ (v. 2, p. 218.). The antenne are equally similar 
in structure in Typhlopone and several ants. In my drawings 
of T. fulva, made immediately after the meeting of the British 
Association at Cambridge, the antenne of 7. fulva are repre- 
sented as having only eleven joints ; that is, one joint less than 
the typical number in female and neuter aculeate Hymeno- 
ptera. A specimen recently given tome by Mr. Raddon, ex- 
hibits also eleven decided joints in the antenne. Mr. Shuck- 
ard describes them as “ consisting apparently of only ten 
joints,” and blames me for not having described these organs, 
as well as for having omitted a generic and specific descrip- 
tion of 7. fulva in my ‘ Introduction,’ where they would have 
been out of place. Mr. Shuckard does not endeavour to show 
in what way the loss of the two joints, which he states to be 
wanting, occurs, but he assumes that the circumstance of 
Myrmecodes and other apterous Mutillide having only eleven 
joints in the antenna, proves that Typhlopone is allied to 
those genera. Now Latreille, with true philosophic spirit, 
has shown how this loss occurs in the Myrmecodes and Myzine 
(‘ Régne Animal,’ 5. 316, 318.), namely, by the second jomt 
being lodged within the extremity of the first joint, by which 
it is hidden. Such is also the case in the Thynni, which are 
the males of Myrmecodes; but it is not so in Typhlopone, 
and the loss must be accounted for in some other manner. 
Mr. Shuckard, indeed, describes the 7. Thwaitsii as having 
eleven jointed antenne, and 7. Spinole as having apparently 
twelve joints, arising from the large terminal joint being 
divided in its middle by a slender dark ring, thus proving 
that it is by the soldering together of the terminal joints, 
and not by the immersion of the second joint within the apex 
of the long basal joint, that this is effected. Hence we per- 
ceive an identity of structure between Typhlopone and the 
Ants, and a dissimilarity between them and the Mutillide. 
The former is still further confirmed by the fact, that I have 
detected in some species of Ants, which I shall describe at 
the end of this paper, only ten joints in the antenne, and that 
