INSECTA. 
133 
to separate in a general way the species which are strictlv endemic 
from those which have subsequently been introduced and become 
naturalized and thus it is that out of the 95 which are enume- 
rated in the following catalogue there are only 17 concerning which 
Mr. Wollaston (in that particular respect) has much doubt. He 
says : “ Indeed what we may term the ' «//r«-indigenous’ species 
speak at once, and unmistakably, for themselves ; and in like 
manner as regards those which are more or less cosmopolitan, or 
which have found their way, through human agencies, into nearly 
eveiy country which has the slightest intercommunication with the 
civilized world, there can he no question. These manifest importa- 
tions last mentioned, which, however, figure so largely in the St. 
Helena list, have no real bearing on the true fauna of any single 
region beyond those whence they were originally disseminated, and 
for the most part owe their presence in local catalogues merely to 
the amount of research which may happen to have been made in the 
houses, stores, gardens, and merchandize around the various ports 
and towns. Yet, on the other hand, they cannot be omitted or 
ignored; for some of them may have taken so firm a hold on the 
newly acquired area as to occupy a prominent place amongst its 
primeval organisms, and even perhaps to have aided indirectly in 
their very extermination. This latter contingency, however, seems 
to me to represent the exception rather than the rule ; for I have 
myself generally observed that the species which are manifestly im- 
ported linger almost exclusively about the * inhabited regions/ and 
seldom attach themselves to those which are emphatically wild and 
uncultivated — and even if in a few instances they should do so, that 
their modus vivendi is totally different from that of the veritable 
autochthones of the soil.” Mr. Wollaston, hearing in mind the above 
considerations, concludes that out of the 95 species, only 42 (or less 
than one-half) appear to be unmistakably indigenous, whilst the 
evidently imported ones (species which through human agencies 
have become widely disseminated over more or less of the civilized 
world) amount to about 36, leaving a residuum of 17 which he 
would perhaps characterize as “doubtful,” but the majority of 
which, nevertheless, have in all probability been naturalized. 
Those which Mr. Wollaston believes to be indigenous, and not 
derived from any other country, are the following : — 
