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Paranthrene Heucherae — Part 2
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The Pacific subregion includes central and northern California and the valley lying between the coast and the western outliers of the central cordillera. The subregion extends northward into British Columbia. There is shown here a distinct resemblance to the fauna of Europe and temperate Asia.
Beginning in Labrador on the east and extending across the entire northern portion of the continent into Alaska is a region which we may call the Holarctic subregion, in which the genera and species alike of plants and animals are for the most part the same which are found in similar latitudes in the Eastern Hemisphere. In Alaska there is evidence of a distinct connection between the flora and fauna of Asia. Greenland and Labrador, together with some of the adjacent islands, show remarkable affinities to the flora and fauna of boreal Europe and the Alps.
Various subdivisions of these broader areas have been suggested, but in the main the subregions which the writer has indicated suffice to show the differences in these tracts.
"...From every chink
And secret corner, where they slept away
The wintry storms--or rising from their tombs
To higher life--by myriads, forth at once,
Swarming they pour, of all the varied hues
Their beauty-beaming parent can disclose.
Ten thousand forms! ten thousand different tribes!
People the blaze."