70 
our twenty species of Pteropliorina constitute about four-seventlis 
of the Jji-itish list. When the woods of the west and north of 
J^orfolk, and its extensive coast line have been carefully worked, I 
suspect that these proportions will be somewhat altered. 
Ot species apparently confined solely to this county, as far as 
the British Islands are concerned, we have six, four of which — 
Lithosia muscerda, Xonagria brevilinea, Cranibus paludellus, and 
Sericoris doubledayami, are confined to the fens, one, Crambus 
fascelinellus, inhabits the sandy denes at Yarmouth ; and one, 
Nothris verba.scella, is atbxched to the very local Mullein, Verbas- 
cum pulverulentum, which grows so abundantly round Norwich. 
AVhilothe Norfolk fens produce several species which do not 
appear to occur in those of (’ambridgeshire, the latter are favoured 
with the pri'sence of a numlier of which I can find no reliable 
record in Norfolk. Conspicuous among these are Bhragmatacia 
arundinis, llypercompa dominula, Orgyia cmnosa, Noctua 
subrosea, Pionea margaritalis, Nascia cilialis, I )ictyopteryx 
lor(|uiniana (uliginosana,) and Argyrolepia schrebersiana. As 
the speedy extinction of most of these species in the Cambridge 
fens is a matter of jirobability amounting almost to certaintv, it 
would be of great service to Entomology that they should, 
if possible, be transplanted into the fens of Norfolk, where they 
would have room to increase and multiply. This has been 
attempted, in the case of the two first-named species, during the 
last year, but probably not to a sufficient extent to ensure their 
permanent establishment. Although these few are absent, an 
inspection of the list will show that the fens contribute a very 
large proportion of our most local and interesting species. 
Ihe chalk districts round Norwich produce some uncommon 
and little known species, such as Homceosoma nebulella, Argyro- 
lepia subbaumanniana, Eupoecilia degreyana, Stephensia brunffich- 
ella, and others ; and the sandhills of the coast .are favoured by the 
presence of such rarities as Agrotis ripje, Nvetegretes achatinella 
and Eupoeciha pallidana, while many of the commoner coast sand- 
hill species are found also on the singular stretch of postglacial 
sea-sands at Thetford, Brandon, and their neighbourhood. This 
di.strict also appears to form the head-quarters of a number of 
species so excessively local in their distribution, that they were 
formerly considered to be among the rarest of our British insects. 
