. The classification, evolution, and dispersal of the winter stonefly genus Allocapnia. Insects; Allocapnia. 141. Fig. 90. Distribution of Allocapnia recta. Circles with crosses are hybrid flocks of ancestral and derived forms, solid circles are the derived form Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ross, Herbert Holdsworth, 1908-; Ricker, William Edwin. Urbana, University of Illinois Press

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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectinsects