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Aug. R. Grote
1886 Canadian Entomologist  
Again, the generaCitheroniaandEaclesare a South American element in our fauna, while the typical Attacinæ, such asActias, probably belong to the Old World element in our fauna, together with all ourPlatypteryginœ. Among the Hawk Moths the generaPhilampelusandPhlegethontiusare of probable South American extraction, though represented now by certain strictly North American species. Mr. Robert Bunker, writing from Rochester, N. Y., records the fact thatPhilampelus Pandorus, going into chrysaiis
more » ... g into chrysaiis Augnst 1, came out Sept. 10 as a moth, showing that in a warmer climate the species would become doublebrooded. And this is undoubtedly the case with many species the farther we go South, where insect activities are not interrupted so long and so strictly by the cold of winter. Since the continuance of the pupal condition is influenced by cold, a diminishing seasonal temperature for ages may have originally affected, if not induced, the transformations of insects as a whole. Butterflies and Moths which are single brooded in the North become double brooded in the South.
doi:10.4039/ent18213-11 fatcat:wtlmxs6hzbfb3pfs7sefeut6yq