282 
number of species is so overwhelming that until a much 
larger proportion has been carefully studied and described it 
would not be wise to venture an opinion as to whether they 
should all remain included within the limits of the one "group" 
or ought to be split up into several ''groups," and therefore 
T do not propose to aiscuss that point at present. I have 
already published a revision of the enormous genus Heter- 
oni/cV, and have now before me a great number of additional 
species, which I hope to deal with at no distant date. I have 
also furnished a revision of the extensive genus Colpochila an- 1 
of that also have now numerous additional species. Of the 
more extensive genera of the "group" there still remains 
Liparetrus to be revised by me, of which, in the following 
pages I attempt a revision, adding some notes preparatory 
for more detailed work on some other genera closely connected 
with Lijmretrus. I may here draw attention to my having 
furnished (in the previous memoir already referred to) a 
tabulation of the characters, together with some notes on the 
same, of the Australian genera known to me that can be re- 
ferred to the Sericoides, though it should be noted that in 
that memoir I omitted the Sfefhaspides (probably by an over- 
sight), and limited my remarks to the Hefcronycid portion 
of the sub-tribe. That, however, is a matter of little import- 
ance, as the known species of Australian Sfefha.<ip?des are only 
two in number, nor is it probable that there are many more 
to be added in the future : and, moreover, I do not think 
that they will stand permanently in the Sericoid series. The 
Stef has pules, however, do not call for remark here. 
Liparetrus. 
I have found the study of this very extensive genus one 
df the most difficult tasks that I have encountered in Aus- 
tralian entomology, not on account of the close alliance of 
its species (for most of them have exceptionally distinctive 
structural characters), but on account of the very unsatisfac- 
tory nature of the monograph of the genus written by Sir 
W. Macleay, and published in the Proceedings of the Lin- 
nean Society of New South Wales, A.D. 1886, which is ren- 
dered practically useless by the fact that no reliance can be 
placed upon the apportionment of the species between the 
two principal groups into which it divides the genus founded 
upon the number of joints in the antennae. I regret to find 
that I have to make some corrections in my own work on 
Liparetrus, in describing, many years ago, some species as 
new which I now find had been previously named by Sir W. 
Macleay, I not having discovered at that time that Sir W. 
Macleay's statements of antennal structure were in many in- 
