270 D. Suarp—Topographical Table of Hawaiian Coleoptera. 
by these artificial and natural methods, there still remains a large portion standing 
out in striking contrast with the others, which we are justified in considering 
strictly endemic or autochthonous. 
In the table of distribution I have endeavoured to distinguish these three com- 
ponents by adding “int.” for introduced, to the names of those I believe to belong 
to the first category, and ‘‘imm.” for immigrant to those I suppose to belong to the 
second, and “aut.” for autochthonous, to the truly endemic species. Our knowledge 
is not yet sufficiently advanced to enable us to decide, in the case of many of these 
species, certainly to what category they should be referred, and I have intimated 
this doubt by a note of interrogation. 
On looking over the table we find there are fifty-six species that we may feel 
certain are merely artificial introductions, and ten that are almost certainly natural 
immigrants, and also forty others that we may be sure belong to one or other of 
these two categories, though we cannot at present safely decide to which. It 
would, for instance, not be possible for us to decide, on the very small evidence 
we at present possess, whether certain of the foreign Longicorns have been intro- 
duced with trees for planting, or with building timber, in which cases they would 
be cited as introduced, or whether they may have arrived in more or less remote 
periods with trees or logs brought by natural currents. Still these forty species, 
being foreign, may with certainty be subtracted from the endemic or autochthonous 
fauna. There are also eighty-four species which, though they are not yet known 
outside the islands, I believe from various reasons and different kinds of evidence 
to be also immigrant species and not endemic; and there are, in addition, twenty- 
four others which I suspect to be immigrant, but which may really prove to be 
autochthonous. If we subtract all these, we find left a total of 214 species—curi- 
ously enough exactly one half of the total known fauna—that we must, in the 
present condition of the science of entomology, consider to be autochthonous. 
Although the introduced and immigrant species play an important part in the 
extant fauna, yet the former are to the naturalist of little interest, and I shall not 
farther discuss them. The immigrant species are, however, of much greater 
importance to the biologist, and if it were certainly determined which of the 
species were natural introductions, or immigrants, as I prefer to term them, and’ 
what countries they have come from, it would throw a most important light on 
many of the obscure features of the geographical distribution of animals. At 
present entomological knowledge is not sufficiently advanced to enable us to do 
this. Most of these immigrants are small insects, that have not yet been collected 
or preserved, from tropical countries, or even in our own colonies; we must, there- 
fore, wait for a further advance in Coleopterology before we can generalize with 
advantage on this subject. The only group where we can at present do this with 
any chance of approximation to exactness is in the case of the Longicorns, and 
here unfortunately the number of the species is but small; I may note, however, 
