INTRODUCTORY REMARKS, xl 
the first thing that strikes us is the strange preponderance of the 
Rhyncophora amongst the ultra-indigenous forms, and the deficiency 
of the Eucerata and Hydradephaga in both sets. The relative pro- 
portions of the other Sections, in the two Catalogues, must speak 
for themselves, as we have not space to comment upon them. We 
may however just remark, that the Geodephaga, which was absolutely 
unrepresented in the enumeration of introduced species, has [not 
merely a fair proportion of endemic exponents in the Madeiras, but] 
a considerable number of members which would appear (if my 
premises be correct) to have found their way thither, from Mediter- 
ranean latitudes, at the remote epoch when this Atlantic province 
was gradually overspread by the insect-inhabitants of the adjoining 
regions. And we arrive therefore at this significant fact, that, 
although the Geodephaga possess ample powers of self-diffusion 
through natural causes, they are very difficult of dissemination by 
artificial ones. 
But let us revert to the general statistics. As already stated, the 
entire number of species (indigenous and naturalized) which have 
been as yet detected in the Madeiras is 580. Arranging the Sections 
which contain them, according as each is numerically represented, 
they stand thus :— 
DTU NCOPHORG sii Slel8. slats ol. stg Mcanmin lacy F004 on lll 
DEP BACRCUIET A, oi. se Nn 6 cece cae sts soe ek: 102 
IVCCHOPRAIA Miia anupeelek ns sence ey. te ee take 99 
MG CORCPAGAN Riaitrt I Neleles Mom, Se andere hes 71 
DBILELELOMETD, ». wold Servers lee CaaS 49 
Brom PEOCERGLE (es «ao take eo te i ge 40 
Wel COROULOCCH OLE 1. ciane'a. a, sc aitie, a) ize, Seale oe Me aa tania 25 
BE ERYLODN AGG 4 caps: as-ctn} ay oroumtogsiobs Way apni shelbiteld ako % 25 
QUE SCUMOEIUITENT, # event. minh. stake he, sete eRstees RT « 23 
AUF eRNONAI Sv ene Ror Tce cet ae LZ 
MAP CCT ACEO etre su, oes op cafes esta cia, © 4, Siete Mision 10 
ETO CON AG Coca. cirs «\ SMS satay on Wabetes alsvepotared 8 
580 
If now we add together the “‘indigenous” and “ultra-indigenous” 
lists, given above, we shall have the following proportions for the 
ever rough they be, and approximately correct) is more likely perhaps to lead to 
sound conclusions respecting the statistics than if we were to base our calcula- 
tions upon a too rigid admission of the fourfold nature of our Coleoptera. I 
shall therefore, as the safer plan, regard the fauna, generally, in its twofold light. 
