. . .f a distinct race,—so distinct indeed as to have long received another name, S. subrotundata, from British naturalists. I think it far from improbable that the Tachyporus nitidicollis, Steph., an insect eminently characteristic of that country (and one on which I have lately offered some remarks[7]), is but a darker climatal modification of the common T. obtusus: and it is well known that the examples of Pelophila borealis, Payk., from Killarney and Loch Neagh are permanently larger, and much more metallic, than those from the Orkneys. The Nebria complanata, Linn., assumes a more pallid hue in the neighbourhood of Bordeaux than it does on the sandy coasts of Devonshire and Wales: and I have but little doubt that the Omaseus nigerrimus, Dej., of Spain, the north of Africa, and Madeira, is a geographical state of the O. aterrimus of Central Europe. The Sitona gressoria, Illig., so universal throughout the Mediterranean districts, Madeira and the Canaries, may be b. . . Read More