entitled, Fossil Flora and Fauna of
the Pennsylvanian Period, Will County, Illinois by George Langford (1876-1964) Return
Winged Insects &
Insect Wings, pp 114-115. Note:
of the original page 114 is here; page
115 is here. The original page was letter size
but the image may have been cropped slightly.
To view any of these images at
full size, right-click on the image and
Insects & Insect Wings - Handwritten notes by GL.