Brian Boyd responds:
Here is my Library of America note at this point (or
at least that’s what I have in my files: might not have survived
into the edition, my copies of which are 12,000 miles away):
amid
an ovation of crickets and that vortex of yellow and maroon
butterflies that so pleased Chateaubriand on
his arrival in America] Chateaubriand
describes the trees and the birds, but no butterflies, on his
landing in Chesapeake Bay on 2 July 1791 (Mémoires
d'Outre-Tombe, ed. Maurice Levaillant and Georges
Moulinier [Paris: Gallimard, 1951, 1957] I,217); six weeks
later, he notes simply, "We camped in meadows bedaubed with
butterflies and flowers" (I, 241); describing botanizing by the
Ohio, perhaps another six weeks later, he reports "mayflies and
butterflies which, in their brilliant array, vied with the
speckled flora" (I, 259). This last passage is in fact mostly
lifted from William Bartram's 1791 account of his travels
through the Carolinas. In his American tales, especially the
beginning of
Atala, Chateaubriand borrowed even more heavily
from earlier travelers, to produce a still more exotic effect,
and this is perhaps Nabokov's point.
Perhaps Matthew Roth has more.
Brian Boyd