Fig. 2. Scanning electron micrographs of the surfaces used for the measurements of
the pulling forces of the beetles: (A) a glass microscope slide, (B)
photographic paper, (C) a fresh leaf of Glyceria maxima, (D) a fresh
and (E) a dry leaf of Phragmites communis and (F) filter paper. (G)
Lateral view of the contact zone between the tarsal tenent setae (ts) of
tarsomere IV of Stenus pubescens and a dry Phragmites leaf.
Scale bars: A—F, 100 µm; G, 3 µm. The plant surfaces represent the
adaxial surfaces of young (uppermost) leaves of plants collected in the field.
Fresh leaves of Glyceria maxima and Phragmites communis were
observed directly using low-voltage scanning electron microscopy, whereas all
the other surfaces were air-dried and gold-coated before examination at high
voltage. wb, wax blooms.
