D. Saarp—Topographical Table of Hawaiian Coleoptera. 271 
that there are three species of Longicorns that I look on as probably immigrant, 
and six that I consider as introductions, and that the three immigrants have come, 
one from the Philippine Islands, one from tropical America, and one from some 
other of the Polynesian Islands. So far as we may generalise from these three, 
cases it would appear that these immigrants have been derived from the nearest 
lands in various directions, and these conclusions will, I fancy, be farther supported 
by the immigrants belonging to less studied groups. 
But the chief interest of the Sandwich Island fauna is attached to its endemic or 
autochthonous components, and these, on being separated from the foreign elements, 
will be found to contrast strongly with the latter in many respects. Thus, though 
there are members of thirty-eight families found in the islands, yet the autochtho- 
nous half of the fauna occurs only in nine of the families, while the foreign half of 
the fauna has its components scattered through the whole of the thirty-eight 
families, except only the Aglycyderidz (which is nearly peculiarly Hawaiian). 
The autochthonous Coleopterous fauna is made up as follows :—The family Cara- 
bide has fifty-one species, distributed in seven genera, all peculiar to the islands ; 
the family Staphylinide has nineteen species, distributed in three genera, only one 
of which is peculiar, though were not these insects so minute they would probably, 
if we were to judge from their strange appearance, form other distinct genera; the 
Nitidulide have thirty-eight species belonging to two genera, one of which is 
peculiar, while the other is composed by a large assemblage of very varied forms ; 
the Elateridz have seven species forming a peculiar genus ; the Anobiini (Ptinide) 
have nineteen species in three peculiar genera; the Cioidze nineteen species in one 
genus, not peculiar, but forming an assemblage of varied forms; Aglycyderide 
has the one genus with thirty species peculiar ; the Curculionide are represented 
by three peculiar genera of Cossonini, with twenty-one species; and the Ceram- 
bycide by one peculiar genus of ten species. 
Continuing our contrast of the autochthonous and foreign components of the 
fauna, we find that while the 214 foreign Coleoptera belong to 132 genera, giving 
an average of 1°62 in each genus; the 214 autochthonous species belong to only 
eighteen genera, giving an average of 11°9 in each genus. 
Moreover, these truly native Hawaiian Coleoptera form a true micro-fauna— 
that is to say, they present us in miniature in each group with those numerous 
cross-affinities and complex repetitions of peculiarities that render the establishment 
of genera and larger groups of a really natural nature so very difficult. 
My knowledge—and I think I may say our knowledge—of generalized Coleop- 
terous structures is not sufficiently advanced to enable me to say with anything like 
authority whether these supposed autochthonous beetles are more or are less 
specialized in their structure than the average of beetles of other lands. I am 
inclined to the opinion, however, that there are in this respect two different 
elements among them—viz. one in which specialization is lower than the average, 
TRANS. ROY. DUB. SOC., N.S. VOL. Il. 20 
