x INTRODUCTORY REMARKS, 
The 45 unquestionably introduced species just alluded to are distri- 
buted under the following divisions (thus numerically arranged) : 
Neerophaga 15, Priocerata 9, Rhyncophora 7, Eucerata and Hete- 
romera 5, Cordylocerata 2, Hydradephaga and Phytophaga 1, Brach- 
elytra, Pseudotrimera, Philhydrida, and Geodephaga 0. And the 75 
probably introduced ones stand thus: Necrophaga 20, Brachelytra 14, 
Cordylocerata and Rhyncophora 10, Phytophaga 5, Philhydrida and 
Pseudotrimera 4+, Hydradephaga and Heteromera 3, Eucerata and 
Priocerata 1, Geodephaga 0. Now it is very possible that I may 
have been mistaken in my exact separation of these two sets, and 
that they should, more safely, be regarded as one; nevertheless, be 
this as it may, we perceive that the Geodephaga does not in either 
instance make a single contribution towards the list of naturalized 
forms ; whilst, on the other hand, the Necrophaga, in both cases, far 
exceeds every other Section. So that it would appear (if my pre- 
mises be sound) that the members of the latter group are more 
liable than those of any other to become diffused, by human and 
other artificial agencies, throughout the civilized world; and that 
those of the former are the least so of all. And this, I conceive, is 
in perfect accordance with the habits of the creatures. 
If the consideration, however, of those species which are certainly 
and probably naturalized (contained in the first two of the assem- 
blages above defined) lead us to the general conclusion just arrived 
at ; we may notice, on the other hand, an interesting local peculiarity 
whilst contemplating the members of the last two Sections,—viz. 
those which are (whether absolutely endemic or otherwise), in the 
common sense of the word, imdigenous*. Now, placing the two 
following lists alongside each other, thus: 
Ultra-indigenous. Indigenous. 
l. Rhyncophora. ...00.. 5% 73 1. Brachelytrain. cas! hes 51 
2. Necrophaga .......... 40 2. Geodephaga os. sist vas 35 
B PBK ACHelytie | 6% Whe anes 37 me Weerophiga: Jen Js satthen 24 
4, Geodephaga .......... 36 Ay ERR COPRONA ac a.« oilers aga 21 
D. ALCLEV OME <4. mien ue 26 Di ELCLETOM EG no soca ote 15 
. PYIOC REE werk 6 iso po ate 19 6. Pseudotrimera ......4. 12 
M; ERYCODROGA . a gion ot 10 Lc EVOOCETOLE aici sc sete o's fig 
8. Pseudotrimera .....++. 7 8.) PRULOPRAGE. hens Sue as 9 
9. Philhydrida 0. et 6 9. Cordylocerata.........5 8 
10. Cordylocerata.......... 5 LO Philigarida® 22a 7 
LES ECE AEG sos 5a (is ae sn sinh 4 ll. Hydradephaga ........ 1 
12. Hydradephaga ........ 3 V2 COREE « steely. nik ant ole ate 0 
266 194 
* J may state that this distribution of the species under two heads only (how- 


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