264 D. Suarep—Topographical Table of Hawaiian Coleoptera. 
We may treat Cyclothorax, therefore, as at present appearing to be characteristic 
of the archipelago, for we must remember that if species are occasionally immi- 
grant to the islands from other parts of the world, the reverse is no doubt 
sometimes the case, and the productions of these or other remote islands may 
occasionally find their way to other regions of the earth and become established 
there. As regards the Bembidiini, we can at present form no accurate conception 
of whether they are endemic or not. They are very obscure small insects, 
and it is probable that some of them—possible that all of them—may have reached 
the islands from outside, some of the Tachys under bark of logs, some of the 
Bembidia with the earth attached to the roots of floating trees, or even with the 
ballast of ships. Leaving them out of the question, it appears that the islands have 
seven genera of peculiar Anchomenini, comprising no less than fifty-one species, 
while the non-endemic, or doubtfully endemic Carabidz are none of them Ancho- 
menini, and amount to ten species distributed in four genera, and two sub-families. 
This brings out a striking endemicity in the Hawaiian Anchomenini, which is much 
increased by a more detailed study of their peculiarities; and, in illustration of 
this, I may mention that Mr. H. W. Bates—undoubtedly at present the first of our 
authorities on this important family of beetles—when I had the pleasure of sub- 
mitting to him a series of about half the species of Hawaiian Anchomenini, pro- 
nounced them, after a brief inspection, to be very peculiar and highly endemie. 
Indeed, so peculiar are some of these Anchomenini that they have been referred by 
authorities to other sub-families, Mr. Blackburn and Herr Karsch having considered 
one of the genera—Atrachyenemis—as a member of the Harpalini, and Karsch 
having treated another genus—Disenochus—as a member of the Broscini, while 
Mr. Blackburn thought it rather to belong to Pterostichini. Although I have been 
able to examine each of these genera in a very imperfect manner, I believe, how- 
ever, that both will prove to be aberrant Anchomenini. 
The family Dytiscidz has only two genera and three species, all of the latter 
but none of the former being peculiar. I think it probable, however, that all the 
species will be found elsewhere ; one of them, indeed, has an allied species, formerly 
supposed to have been the same species, in Tahiti. The members of this family 
appear to be capable of greater migration than those of almost any other group of 
beetles. 
The family Hydrophilidz is poorly represented by four species in three genera; 
two of the species are peculiar, one of them, moreover, forming a peculiar genus, 
but it is a very small insect, and will probably be found elsewhere; and this will 
pretty certainly be also the case with the species of Hydrobius. 
The Staphylinidz are represented by fifty-five species, distributed in eighteen 
genera. ‘Two of the genera are peculiar, as are forty-three of the species. This 
family is, however, so difficult to deal with, owing to our want of knowledge of 
the smaller exotic forms, and to the small amount of study that has been 
