D. Suarp— Topographical Table of Hawaiian Coleoptera. 269 
Cryptorhynchini, though as regards these latter members it should be remarked 
that Acalles is one of the most frequent components of insular faunz, being very 
richly represented in New Zealand, Polynesia, and the Atlantic islands. The 
Cossonini stand in a very different position; five of the eight genera, and all 
the species are peculiar, while the largest genus—Oodemas—has fifteen species, 
and is peculiar to the island; indeed, there is no near ally known to it. The 
endemic Heteramphus, too, displays a singularly large variety amongst its few 
species, so that though it is quite probable that a good many of the Hawaiian 
Cossonini may prove to be foreign forms, yet there remains a considerable propor- 
tion that we are justified in considering as probably thoroughly autochthonous. 
The family Scolytidz is represented by three widely-distributed genera, having 
between them ten species, of which eight are peculiar; they are xylophagous in 
habits, and very obscure forms; the exotic species have been very little collected, 
and it is very probable that all the Hawaiian Scolytide may prove to be foreign. 
The Anthribide have one widely-distributed species, and in addition a genus 
supposed to be peculiar, but of which only one individual has been found, and is 
probably immigrant. 
The Cerambycidz have in all nineteen species, and of this number nine repre- 
sent each a genus, while the remaining ten all belong to one peculiar genus. Of the 
nine scattered genera, each of which has but one species, seven are known elsewhere, 
one is doubtfully distinct from a foreign form, and the other is an obscure form, 
which may highly probably prove to be also foreign. Indeed I look upon it as 
pretty certain that all the Hawaiian Longicorns, except the genus Clytarlus, are 
of foreign origin. This latter genus has eight species, and they display so much 
difference that they might well form four genera. The only near ally of Clytarlus 
is the Haitian genus Euryscelis, of two species. It is worthy of note that only one 
of the foreign Longicorns has been found in any island except that of Oahu; in 
which island two of them, however—Cerambyx araneiformis and Lamia nutator— 
have become thoroughly naturalised. Clytarlus has been found on all the islands 
visited except Kauai, where probably one or more species remain to be found. 
From the above brief revision of the Coleoptera of the archipelago it will 
be gathered that I am of opinion that a large portion of the fauna has been intro- 
duced from without. I think, indeed, that we may distinguish three elements in 
the fauna—First, species that have been introduced, in all probability comparatively 
recently, by artificial means, such as with provisions, stores, building timber, 
ballast, or growing plants; many of these species are nearly cosmopolitan. Second, 
species that have arrived in the islands, and have become more or less completely 
naturalized; they are most of them known to be wood- or bark-feeders, but some 
that are not so may have come with the earth adhering to the roots of floating 
trees ; a few, such as the Dytiscidz, or water beetles, may possibly have been intro- 
duced by violent winds. Third, after making every allowance for introduction 
